[NFC] Remove redundant includes for llvm/ADT/StringRef.h.

Author: varungandhi-apple

include/swift/Basic/TypeID.h

@@ -19,8 +19,8 @@
 #ifndef SWIFT_BASIC_TYPEID_H
 #define SWIFT_BASIC_TYPEID_H
 
-#include "llvm/ADT/StringRef.h"
 #include "llvm/ADT/TinyPtrVector.h"
+#include "llvm/ADT/StringRef.h"
 #include <cstdint>
 #include <string>
 #include <vector>

include/swift/Basic/UUID.h

@@ -22,7 +22,6 @@
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/Optional.h"
 #include "llvm/ADT/SmallString.h"
-#include "llvm/ADT/StringRef.h"
 #include "llvm/Support/raw_ostream.h"
 #include <array>
 

include/swift/TBDGen/TBDGen.h

@@ -13,7 +13,6 @@
 #define SWIFT_IRGEN_TBDGEN_H
 
 #include "llvm/ADT/Hashing.h"
-#include "llvm/ADT/StringRef.h"
 #include "llvm/ADT/StringSet.h"
 #include "swift/Basic/Version.h"
 #include <vector>