[Clang] Fix conflict resolution in SemaDeclAttr

Author: jsji

clang/lib/Sema/SemaDeclAttr.cpp

@@ -6938,10 +6938,8 @@ ProcessDeclAttribute(Sema &S, Scope *scope, Decl *D, const ParsedAttr &AL,
          Aux && AL.existsInTarget(*Aux)))) {
     if (AL.isRegularKeywordAttribute() || AL.isDeclspecAttribute()) {
       S.Diag(AL.getLoc(), AL.isRegularKeywordAttribute()
-               ? (unsigned)diag::err_keyword_not_supported_on_target
-           : AL.isDeclspecAttribute()
-               ? (unsigned)diag::warn_unhandled_ms_attribute_ignored
-               : (unsigned)diag::warn_unknown_attribute_ignored)
+                              ? diag::err_keyword_not_supported_on_target
+                              : diag::warn_unhandled_ms_attribute_ignored)
           << AL.getAttrName() << AL.getRange();
     } else {
       S.Diag(AL.getNormalizedRange().getBegin(),