remove unused code

Author: cor3ntin

clang/lib/Sema/SemaTemplateInstantiate.cpp

@@ -1647,13 +1647,6 @@ namespace {
                           NamedDecl *FirstQualifierInScope = nullptr,
                           bool AllowInjectedClassName = false);
 
-    /// Check for tag mismatches when instantiating an
-    /// elaborated type.
-    QualType RebuildElaboratedType(SourceLocation KeywordLoc,
-                                   ElaboratedTypeKeyword Keyword,
-                                   NestedNameSpecifierLoc QualifierLoc,
-                                   QualType T);
-
     const AnnotateAttr *TransformAnnotateAttr(const AnnotateAttr *AA);
     const CXXAssumeAttr *TransformCXXAssumeAttr(const CXXAssumeAttr *AA);
     const LoopHintAttr *TransformLoopHintAttr(const LoopHintAttr *LH);