MetadataLoader.cpp - remove unnecessary StringRef include. NFCI.

Already included in MetadataLoader.h

Author: RKSimon

llvm/lib/Bitcode/Reader/MetadataLoader.cpp

@@ -17,7 +17,6 @@
 #include "llvm/ADT/None.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/SmallString.h"
-#include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/Statistic.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/ADT/Twine.h"
@@ -63,7 +62,6 @@
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/Compiler.h"
 #include "llvm/Support/Debug.h"
-#include "llvm/Support/Error.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/ManagedStatic.h"
 #include "llvm/Support/MemoryBuffer.h"
@@ -75,7 +73,6 @@
 #include <deque>
 #include <limits>
 #include <map>
-#include <memory>
 #include <string>
 #include <system_error>
 #include <tuple>