ExternalASTSource.h - remove unused StringRef and <string> includes. NFCI.

diff --git a/clang/include/clang/AST/ExternalASTSource.h b/clang/include/clang/AST/ExternalASTSource.h
index 6ec6edb..b1851af 100644 (file)
--- a/clang/include/clang/AST/ExternalASTSource.h
+++ b/clang/include/clang/AST/ExternalASTSource.h
@@ -24,14 +24,12 @@
 #include "llvm/ADT/PointerUnion.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/SmallVector.h"
-#include "llvm/ADT/StringRef.h"
 #include "llvm/ADT/iterator.h"
 #include "llvm/Support/PointerLikeTypeTraits.h"
 #include <cassert>
 #include <cstddef>
 #include <cstdint>
 #include <iterator>
-#include <string>
 #include <utility>
 
 namespace clang {