Remove the diag

Author: Fznamznon

clang/include/clang/Basic/DiagnosticGroups.td

@@ -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">;
 def MicrosoftInitFromPredefined : DiagGroup<"microsoft-init-from-predefined">;
 def MicrosoftStringLiteralFromPredefined : DiagGroup<
     "microsoft-string-literal-from-predefined">;
@@ -1472,7 +1471,7 @@ def Microsoft : DiagGroup<"microsoft",
      MicrosoftRedeclareStatic, MicrosoftEnumForwardReference, MicrosoftGoto,
      MicrosoftFlexibleArray, MicrosoftExtraQualification, MicrosoftCast,
      MicrosoftConstInit, MicrosoftVoidPseudoDtor, MicrosoftAnonTag,
-     MicrosoftCommentPaste, MicrosoftEndOfFile, MicrosoftStaticAssert,
+     MicrosoftCommentPaste, MicrosoftEndOfFile,
      MicrosoftInitFromPredefined, MicrosoftStringLiteralFromPredefined,
      MicrosoftInconsistentDllImport, MicrosoftInlineOnNonFunction]>;
 

clang/include/clang/Basic/DiagnosticParseKinds.td

@@ -474,9 +474,6 @@ def err_bool_redeclaration : Error<
 def warn_cxx98_compat_static_assert : Warning<
   "'static_assert' declarations are incompatible with C++98">,
   InGroup<CXX98Compat>, DefaultIgnore;
-def ext_ms_static_assert : ExtWarn<
-  "use of 'static_assert' without inclusion of <assert.h> is a Microsoft "
-  "extension">, InGroup<MicrosoftStaticAssert>;
 def ext_cxx_static_assert_no_message : ExtWarn<
   "'static_assert' with no message is a C++17 extension">, InGroup<CXX17>;
 def ext_c_static_assert_no_message : ExtWarn<