[clang] [win][clang] Do not inject static_assert macro definition (PR #147030)

[Aaron Ballman via cfe-commits]

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@@ -1450,7 +1450,6 @@ def MicrosoftAnonTag : DiagGroup<"microsoft-anon-tag">;
 def MicrosoftCommentPaste : DiagGroup<"microsoft-comment-paste">;
 def MicrosoftEndOfFile : DiagGroup<"microsoft-end-of-file">;
 def MicrosoftInaccessibleBase : DiagGroup<"microsoft-inaccessible-base">;
-def MicrosoftStaticAssert : DiagGroup<"microsoft-static-assert">;
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AaronBallman wrote:

I was curious whether we should leave the diagnostic group so it's not disruptive, but: https://sourcegraph.com/search?q=context:global+Wno-microsoft-static-assert&patternType=keyword&sm=0

Given there's so little use in the wild, I think it's better to just pull the group entirely so we don't keep it around as tech debt.

https://github.com/llvm/llvm-project/pull/147030