Remove an unneeded header.

llvm-svn: 76716

clang/lib/Sema/ParseAST.cpp

@@ -19,7 +19,6 @@
 #include "clang/AST/ExternalASTSource.h"
 #include "clang/AST/Stmt.h"
 #include "clang/Parse/Parser.h"
-#include "llvm/ADT/OwningPtr.h"
 using namespace clang;
 
 //===----------------------------------------------------------------------===//