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

[Mariya Podchishchaeva 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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Fznamznon wrote:

Does it make sense to mention in the release note that there is no flag anymore?

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