Remove VariadicOperatorMatcherInterface as it is redundant with logic from DynTypedMatcher.

Summary:
The generic variadic matcher is faster (one less virtual function call
per match) and doesn't require template instantiations which reduces
compile time and binary size.
Registry.cpp.o generates ~14% less symbols and compiles ~7.5% faster.
The change also speeds up our clang-tidy benchmark by ~2%.

Reviewers: klimek

Subscribers: klimek, cfe-commits

Differential Revision: http://reviews.llvm.org/D6278

llvm-svn: 222131
diff --git a/clang/lib/ASTMatchers/Dynamic/Marshallers.h b/clang/lib/ASTMatchers/Dynamic/Marshallers.h
index 30beb69..42c880e 100644
--- a/clang/lib/ASTMatchers/Dynamic/Marshallers.h
+++ b/clang/lib/ASTMatchers/Dynamic/Marshallers.h
@@ -556,7 +556,7 @@
 /// \brief Variadic operator marshaller function.
 class VariadicOperatorMatcherDescriptor : public MatcherDescriptor {
 public:
-  typedef ast_matchers::internal::VariadicOperatorFunction VarFunc;
+  typedef DynTypedMatcher::VariadicOperatorFunction VarFunc;
   VariadicOperatorMatcherDescriptor(unsigned MinCount, unsigned MaxCount,
                                     VarFunc Func, StringRef MatcherName)
       : MinCount(MinCount), MaxCount(MaxCount), Func(Func),