Review use of `BC41004` warning

The latest changes from dotnet/runtime (https://github.com/dotnet/winforms/pull/3804) couldn't be merged due to build failures:
```
##[error]src\Microsoft.VisualBasic.Forms\src\Microsoft\VisualBasic\Devices\Network.vb(822,20): error BC41004: (NETCORE_ENGINEERING_TELEMETRY=Build) First statement of this 'Sub New' should be an explicit call to 'MyBase.New' or 'MyClass.New' because the 'Public Overloads Sub New()' in the base class 'WebClient' of 'WebClientExtended' is marked obsolete: 'Use HttpClient instead.'
```

The error was suppressed in https://github.com/dotnet/winforms/pull/3804/commits/590399f903a2bc5a3ac8ef5644e3337b0b0f1179.

The suppression needs to be reviewed, and corrected.