Security.ServerVulnerabilityAssessment API failed to delete the Server Vulnerability Assessment

After tested, API failed to delete the Server Vulnerability Assessment and threw below error message. After confirmed with service team, seems it's a bug. Hopes it could be fixed by service team asap since we're blocked on this issue.

```
DELETE https://management.azure.com/subscriptions/xx-xx-xx-xx/resourceGroups/xxxxxx/providers/Microsoft.Compute/virtualMachines/xxxxx/providers/Microsoft.Security/serverVulnerabilityAssessments/default

Error message:
security.ServerVulnerabilityAssessmentClient#Delete: Failure responding to request: StatusCode=202 -- Original Error: autorest/azure: error response cannot be parsed: "" error: EOF
```

No repository file or test is identified. Start by locating the Microsoft.Security serverVulnerabilityAssessments DELETE specification and reproducing the request; done means the 202 response is handled without the client’s EOF parsing error and the assessment deletion is confirmed.

Written by the indexing model from the issue text.