fix build

Author: cor3ntin

clang/include/clang/AST/ASTContext.h

@@ -3873,26 +3873,5 @@ typename clang::LazyGenerationalUpdatePtr<Owner, T, Update>::ValueType
   return Value;
 }
 
-template <> struct llvm::DenseMapInfo<llvm::FoldingSetNodeID> {
-  static FoldingSetNodeID getEmptyKey() { return FoldingSetNodeID{}; }
-
-  static FoldingSetNodeID getTombstoneKey() {
-    FoldingSetNodeID id;
-    for (size_t i = 0; i < sizeof(id) / sizeof(unsigned); ++i) {
-      id.AddInteger(std::numeric_limits<unsigned>::max());
-    }
-    return id;
-  }
-
-  static unsigned getHashValue(const FoldingSetNodeID &Val) {
-    return Val.ComputeHash();
-  }
-
-  static bool isEqual(const FoldingSetNodeID &LHS,
-                      const FoldingSetNodeID &RHS) {
-    return LHS == RHS;
-  }
-};
-
 
 #endif // LLVM_CLANG_AST_ASTCONTEXT_H