[clang] [Lex] Remove unused includes (NFC) (PR #116460)

[Nikita Popov via cfe-commits]

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@@ -14,14 +14,10 @@
 #include "clang/Basic/CharInfo.h"
 #include "clang/Basic/FileManager.h"
 #include "clang/Lex/HeaderMapTypes.h"
-#include "llvm/ADT/SmallString.h"
 #include "llvm/Support/Compiler.h"
-#include "llvm/Support/DataTypes.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/MathExtras.h"
 #include "llvm/Support/MemoryBuffer.h"
-#include "llvm/Support/SwapByteOrder.h"
-#include "llvm/Support/SystemZ/zOSSupport.h"
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nikic wrote:

I think this one might be needed due to the use of strnlen in this file?

https://github.com/llvm/llvm-project/pull/116460