Remove-AzNetworkSecurityRuleConfig doesn't support WhatIf

## Description
Looks like the current az powershell module doesn't support 'WhatIf':

PS Azure:\> get-help Remove-AzNetworkSecurityRuleConfig
NAME
Remove-AzNetworkSecurityRuleConfig

SYNOPSIS
Removes a network security rule from a network security group.

SYNTAX
Remove-AzNetworkSecurityRuleConfig [-DefaultProfile ] [-Name
] -NetworkSecurityGroup []

DESCRIPTION
The Remove-AzNetworkSecurityRuleConfig cmdlet removes a network security rule configuration from an Azure network security group.

RELATED LINKS
Online Version: https://docs.microsoft.com/en-us/powershell/module/az.network/remove-aznetworksecurityruleconfig
Add-AzNetworkSecurityRuleConfig
Get-AzNetworkSecurityRuleConfig
New-AzNetworkSecurityGroup
New-AzNetworkSecurityRuleConfig
Set-AzNetworkSecurityRuleConfig

REMARKS
To see the examples, type: "Get-Help Remove-AzNetworkSecurityRuleConfig -Examples"
For more information, type: "Get-Help Remove-AzNetworkSecurityRuleConfig -Detailed"
For technical information, type: "Get-Help Remove-AzNetworkSecurityRuleConfig -Full"
For online help, type: "Get-Help Remove-AzNetworkSecurityRuleConfig -Online"

Azure:/

## Steps to reproduce

```powershell
PS Azure:\> Remove-AzNetworkSecurityRuleConfig -NetworkSecurityGroup $networkSecurityGroups -Name $nsgName -DefaultProfile $context -ErrorAction Stop -WhatIf
Remove-AzNetworkSecurityRuleConfig: A parameter cannot be found that matches parameter name 'WhatIf'.
Azure:/
PS Azure:\>
```

## Environment data

```PS Azure:\> $PSVersionTable

Name Value
---- -----
PSVersion 7.0.0-rc.2
PSEdition Core
GitCommitId 7.0.0-rc.2
OS Linux 4.15.0-1071-azure #76-Ubuntu SMP Wed Feb 12 03:02:44 UTC 2020
Platform Unix
PSCompatibleVersions {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion 2.3
SerializationVersion 1.1.0.1
WSManStackVersion 3.0

```

## Module versions

```powershell
Get-Module -ListAvailable

Directory: /usr/local/share/powershell/Modules

ModuleType Version PreRelease Name PSEdition ExportedCommands
---------- ------- ---------- ---- --------- ----------------
Script 3.5.0 Az Core,Desk
Script 1.7.2 Az.Accounts Core,Desk {Disable-AzDataCollection, Disable-AzContextAutosave, Enable-AzDataCollection, Enable-A…
Script 1.1.1 Az.Advisor Core,Desk {Get-AzAdvisorRecommendation, Enable-AzAdvisorRecommendation, Disable-AzAdvisorRecommen…
Script 1.0.3 Az.Aks Core,Desk {Get-AzAks, New-AzAks, Remove-AzAks, Import-AzAksCredential…}
Script 1.1.2 Az.AnalysisServices Core,Desk {Resume-AzAnalysisServicesServer, Suspend-AzAnalysisServicesServer, Get-AzAnalysisServi…
Script 1.3.4 Az.ApiManagement Core,Desk {Add-AzApiManagementApiToProduct, Add-AzApiManagementProductToGroup, Add-AzApiManagemen…
Script 1.0.3 Az.ApplicationInsights Core,Desk {Get-AzApplicationInsights, New-AzApplicationInsights, Remove-AzApplicationInsights, Se…
Script 1.3.6 Az.Automation Core,Desk {Get-AzAutomationHybridWorkerGroup, Remove-AzAutomationHybridWorkerGroup, Get-AzAutomat…
Script 2.0.2 Az.Batch Core,Desk {Remove-AzBatchAccount, Get-AzBatchAccount, Get-AzBatchAccountKey, New-AzBatchAccount…}
Script 1.0.2 Az.Billing Core,Desk {Get-AzBillingInvoice, Get-AzBillingPeriod, Get-AzEnrollmentAccount, Get-AzConsumptionB…
Script 1.4.2 Az.Cdn Core,Desk {Get-AzCdnProfile, Get-AzCdnProfileSsoUrl, New-AzCdnProfile, Remove-AzCdnProfile…}
Script 1.2.3 Az.CognitiveServices Core,Desk {Get-AzCognitiveServicesAccount, Get-AzCognitiveServicesAccountKey, Get-AzCognitiveServ…
Script 3.5.0 Az.Compute Core,Desk {Remove-AzAvailabilitySet, Get-AzAvailabilitySet, New-AzAvailabilitySet, Update-AzAvail…
Script 1.0.3 Az.ContainerInstance Core,Desk {New-AzContainerGroup, Get-AzContainerGroup, Remove-AzContainerGroup, Get-AzContainerIn…
Script 1.1.1 Az.ContainerRegistry Core,Desk {New-AzContainerRegistry, Get-AzContainerRegistry, Update-AzContainerRegistry, Remove-A…
Script 1.1.0 Az.DataBoxEdge Core,Desk {Get-AzDataBoxEdgeJob, Get-AzDataBoxEdgeDevice, Invoke-AzDataBoxEdgeDevice, New-AzDataB…
Script 1.6.1 Az.DataFactory Core,Desk {Set-AzDataFactoryV2, Update-AzDataFactoryV2, Get-AzDataFactoryV2, Remove-AzDataFactory…
Script 1.0.2 Az.DataLakeAnalytics Core,Desk {Get-AzDataLakeAnalyticsDataSource, New-AzDataLakeAnalyticsCatalogCredential, Remove-Az…
Script 1.2.6 Az.DataLakeStore Core,Desk {Get-AzDataLakeStoreTrustedIdProvider, Remove-AzDataLakeStoreTrustedIdProvider, Remove-…
Script 1.1.0 Az.DeploymentManager Core,Desk {Get-AzDeploymentManagerArtifactSource, New-AzDeploymentManagerArtifactSource, Set-AzDe…
Script 1.0.2 Az.DevTestLabs Core,Desk {Get-AzDtlAllowedVMSizesPolicy, Get-AzDtlAutoShutdownPolicy, Get-AzDtlAutoStartPolicy, …
Script 1.1.2 Az.Dns Core,Desk {Get-AzDnsRecordSet, New-AzDnsRecordConfig, Remove-AzDnsRecordSet, Set-AzDnsRecordSet…}
Script 1.2.3 Az.EventGrid Core,Desk {New-AzEventGridTopic, Get-AzEventGridTopic, Set-AzEventGridTopic, New-AzEventGridTopic…
Script 1.4.3 Az.EventHub Core,Desk {New-AzEventHubNamespace, Get-AzEventHubNamespace, Set-AzEventHubNamespace, Remove-AzEv…
Script 1.4.0 Az.FrontDoor Core,Desk {New-AzFrontDoor, Get-AzFrontDoor, Set-AzFrontDoor, Remove-AzFrontDoor…}
Script 0.10.7 Az.GuestConfiguration Core,Desk {Get-AzVMGuestPolicyStatus, Get-AzVMGuestPolicyStatusHistory}
Script 3.0.3 Az.HDInsight Core,Desk {Get-AzHDInsightJob, New-AzHDInsightSqoopJobDefinition, Wait-AzHDInsightJob, New-AzHDIn…
Script 1.0.1 Az.HealthcareApis Core,Desk {New-AzHealthcareApisService, Remove-AzHealthcareApisService, Set-AzHealthcareApisServi…
Script 2.1.0 Az.IotHub Core,Desk {Add-AzIotHubKey, Get-AzIotHubEventHubConsumerGroup, Get-AzIotHubConnectionString, Get-…
Script 1.5.1 Az.KeyVault Core,Desk {Add-AzKeyVaultCertificate, Update-AzKeyVaultCertificate, Stop-AzKeyVaultCertificateOpe…
Script 1.3.2 Az.LogicApp Core,Desk {Get-AzIntegrationAccountAgreement, Get-AzIntegrationAccountAssembly, Get-AzIntegration…
Script 1.1.3 Az.MachineLearning Core,Desk {Move-AzMlCommitmentAssociation, Get-AzMlCommitmentAssociation, Get-AzMlCommitmentPlanU…
Script 1.0.2 Az.ManagedServices Core,Desk {Get-AzManagedServicesAssignment, New-AzManagedServicesAssignment, Remove-AzManagedServ…
Script 1.0.2 Az.MarketplaceOrdering Core,Desk {Get-AzMarketplaceTerms, Set-AzMarketplaceTerms}
Script 1.1.1 Az.Media Core,Desk {Sync-AzMediaServiceStorageKey, Set-AzMediaServiceKey, Get-AzMediaServiceKey, Get-AzMed…
Script 1.6.0 Az.Monitor Core,Desk {Get-AzMetricDefinition, Get-AzMetric, Remove-AzLogProfile, Get-AzLogProfile…}
Script 2.3.1 Az.Network Core,Desk {Add-AzApplicationGatewayAuthenticationCertificate, Get-AzApplicationGatewayAuthenticat…
Script 1.1.1 Az.NotificationHubs Core,Desk {Get-AzNotificationHub, Get-AzNotificationHubAuthorizationRule, Get-AzNotificationHubLi…
Script 1.3.4 Az.OperationalInsights Core,Desk {New-AzOperationalInsightsAzureActivityLogDataSource, New-AzOperationalInsightsCustomLo…
Script 1.2.0 Az.PolicyInsights Core,Desk {Get-AzPolicyEvent, Get-AzPolicyState, Get-AzPolicyStateSummary, Get-AzPolicyRemediatio…
Script 1.1.1 Az.PowerBIEmbedded Core,Desk {Remove-AzPowerBIWorkspaceCollection, Get-AzPowerBIWorkspaceCollection, Get-AzPowerBIWo…
Script 1.0.2 Az.PrivateDns Core,Desk {Get-AzPrivateDnsZone, Remove-AzPrivateDnsZone, Set-AzPrivateDnsZone, New-AzPrivateDnsZ…
Script 2.7.0 Az.RecoveryServices Core,Desk {Get-AzRecoveryServicesBackupProperty, Get-AzRecoveryServicesVault, Get-AzRecoveryServi…
Script 1.2.1 Az.RedisCache Core,Desk {Remove-AzRedisCachePatchSchedule, New-AzRedisCacheScheduleEntry, Get-AzRedisCachePatch…
Script 1.0.3 Az.Relay Core,Desk {New-AzRelayNamespace, Get-AzRelayNamespace, Set-AzRelayNamespace, Remove-AzRelayNamesp…
Script 1.11.0 Az.Resources Core,Desk {Get-AzProviderOperation, Remove-AzRoleAssignment, Get-AzRoleAssignment, New-AzRoleAssi…
Script 1.4.1 Az.ServiceBus Core,Desk {New-AzServiceBusNamespace, Get-AzServiceBusNamespace, Set-AzServiceBusNamespace, Remov…
Script 2.0.1 Az.ServiceFabric Core,Desk {Add-AzServiceFabricClientCertificate, Add-AzServiceFabricClusterCertificate, Add-AzSer…
Script 1.1.1 Az.SignalR Core,Desk {New-AzSignalR, Get-AzSignalR, Get-AzSignalRKey, New-AzSignalRKey…}
Script 2.3.0 Az.Sql Core,Desk {Get-AzSqlDatabaseTransparentDataEncryption, Get-AzSqlDatabaseTransparentDataEncryption…
Script 1.1.0 Az.SqlVirtualMachine Core,Desk {New-AzSqlVM, Get-AzSqlVM, Update-AzSqlVM, Remove-AzSqlVM…}
Script 1.12.0 Az.Storage Core,Desk {Get-AzStorageAccount, Get-AzStorageAccountKey, New-AzStorageAccount, New-AzStorageAcco…
Script 1.2.3 Az.StorageSync Core,Desk {Invoke-AzStorageSyncCompatibilityCheck, New-AzStorageSyncService, Get-AzStorageSyncSer…
Script 1.0.1 Az.StreamAnalytics Core,Desk {Get-AzStreamAnalyticsFunction, Get-AzStreamAnalyticsDefaultFunctionDefinition, New-AzS…
Script 1.0.3 Az.TrafficManager Core,Desk {Add-AzTrafficManagerCustomHeaderToEndpoint, Remove-AzTrafficManagerCustomHeaderFromEnd…
Script 1.6.0 Az.Websites Core,Desk {Get-AzAppServicePlan, Set-AzAppServicePlan, New-AzAppServicePlan, Remove-AzAppServiceP…
Script 0.0.0.10 AzureAD.Standard.Preview Desk {Set-AzureADUserPassword, Get-AzureADGroupAppRoleAssignment, Add-AzureADDirectoryRoleMe…
Script 0.9.3 AzurePSDrive Desk
Script 17.0.2985… EXOPSSessionConnector Desk Connect-EXOPSSession
Manifest 1.0.840 MicrosoftPowerBIMgmt Desk
Binary 1.0.840 MicrosoftPowerBIMgmt.Admin Desk {Add-PowerBIEncryptionKey, Get-PowerBIEncryptionKey, Get-PowerBIWorkspaceEncryptionStat…
Binary 1.0.840 MicrosoftPowerBIMgmt.Capacities Desk Get-PowerBICapacity
Binary 1.0.840 MicrosoftPowerBIMgmt.Data Desk {Add-PowerBIDataset, Set-PowerBITable, New-PowerBIDataset, New-PowerBITable…}
Binary 1.0.840 MicrosoftPowerBIMgmt.Profile Desk {Connect-PowerBIServiceAccount, Disconnect-PowerBIServiceAccount, Invoke-PowerBIRestMet…
Binary 1.0.840 MicrosoftPowerBIMgmt.Reports Desk {Get-PowerBIReport, New-PowerBIReport, Export-PowerBIReport, Get-PowerBIDashboard…}
Binary 1.0.840 MicrosoftPowerBIMgmt.Workspaces Desk {Get-PowerBIWorkspace, Get-PowerBIWorkspaceMigrationStatus, Add-PowerBIWorkspaceUser, R…
Binary 1.0.3 MicrosoftTeams Desk {Get-CsBatchPolicyAssignmentOperation, Invoke-CsBatchPolicyAssignment}
Script 0.9.3 PSCloudShellUtility Desk {Enter-AzVM, Get-AzCommand, Invoke-AzVMCommand, Enable-AzVMPSRemoting…}
Binary 0.8.1 SHiPS Desk
Script 21.1.18218 SqlServer Desk {Add-RoleMember, Add-SqlAvailabilityDatabase, Add-SqlAvailabilityGroupListenerStaticIp,…

Directory: /opt/microsoft/powershell/7-preview/Modules

ModuleType Version PreRelease Name PSEdition ExportedCommands
---------- ------- ---------- ---- --------- ----------------
Manifest 1.2.4.0 Microsoft.PowerShell.Archive Desk {Compress-Archive, Expand-Archive}
Manifest 7.0.0.0 Microsoft.PowerShell.Host Core {Start-Transcript, Stop-Transcript}
Manifest 7.0.0.0 Microsoft.PowerShell.Management Core {Add-Content, Clear-Content, Clear-ItemProperty, Join-Path…}
Manifest 7.0.0.0 Microsoft.PowerShell.Security Core {Get-Credential, Get-ExecutionPolicy, Set-ExecutionPolicy, ConvertFrom-SecureString…}
Manifest 7.0.0.0 Microsoft.PowerShell.Utility Core {Export-Alias, Get-Alias, Import-Alias, New-Alias…}
Script 1.4.6 PackageManagement Desk {Find-Package, Get-Package, Get-PackageProvider, Get-PackageSource…}
Script 2.2.3 PowerShellGet Desk {Find-Command, Find-DSCResource, Find-Module, Find-RoleCapability…}
Script 2.0.5 PSDesiredStateConfiguration Core {Configuration, New-DscChecksum, Get-DscResource, Invoke-DscResource}
Script 2.0.0 rc2 PSReadLine Desk {Get-PSReadLineKeyHandler, Set-PSReadLineKeyHandler, Remove-PSReadLineKeyHandler, Get-P…
Binary 2.0.3 ThreadJob Desk Start-ThreadJob
```

## Debug output

```

```

## Error output

```

```

Start by locating the Remove-AzNetworkSecurityRuleConfig cmdlet implementation and its related tests in the Az.Network module. Reproduce the documented -WhatIf failure, then inspect how comparable cmdlets expose WhatIf and add coverage showing that the command accepts WhatIf without changing the network security group.

Written by the indexing model from the issue text.