TlbImp: Suppress types from being imported

[jozefizso]

Issue from Wed, 09 Sep 2009 11:53:54 GMT
Originally opened at https://clrinterop.codeplex.com/workitem/4231

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With the new version we are able to map all references to the local IStream definition to System.Runtime.InteropServices.ComTypes.IStream.
Unfortunately the now unreferenced local IStream definition, as well as ISequentialStream, _ULARGE_INTEGER etc. are still part of the Interop.
As it is very annoying and confusing have multiple unsused IStream or other type definitions around it would be a nice feature to be able to suppress some types from going into the Interop.