[Lex] Remove unused includes (NFC)

Identified with misc-include-cleaner.

Author: kazutakahirata

clang/lib/Lex/HeaderMap.cpp

@@ -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"
 #include <cstring>
 #include <memory>
 #include <optional>

clang/lib/Lex/HeaderSearch.cpp

@@ -24,7 +24,6 @@
 #include "clang/Lex/ModuleMap.h"
 #include "clang/Lex/Preprocessor.h"
 #include "llvm/ADT/APInt.h"
-#include "llvm/ADT/Hashing.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/SmallVector.h"

clang/lib/Lex/InitHeaderSearch.cpp

@@ -10,16 +10,13 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "clang/Basic/DiagnosticFrontend.h"
 #include "clang/Basic/FileManager.h"
 #include "clang/Basic/LangOptions.h"
 #include "clang/Config/config.h" // C_INCLUDE_DIRS
 #include "clang/Lex/HeaderMap.h"
 #include "clang/Lex/HeaderSearch.h"
 #include "clang/Lex/HeaderSearchOptions.h"
 #include "llvm/ADT/SmallPtrSet.h"
-#include "llvm/ADT/SmallString.h"
-#include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/ADT/Twine.h"
 #include "llvm/Support/ErrorHandling.h"

clang/lib/Lex/Lexer.cpp

@@ -32,7 +32,6 @@
 #include "llvm/ADT/StringSwitch.h"
 #include "llvm/Support/Compiler.h"
 #include "llvm/Support/ConvertUTF.h"
-#include "llvm/Support/MathExtras.h"
 #include "llvm/Support/MemoryBufferRef.h"
 #include "llvm/Support/NativeFormatting.h"
 #include "llvm/Support/Unicode.h"

clang/lib/Lex/MacroArgs.cpp

@@ -14,7 +14,6 @@
 #include "clang/Lex/LexDiagnostic.h"
 #include "clang/Lex/MacroInfo.h"
 #include "clang/Lex/Preprocessor.h"
-#include "llvm/ADT/SmallString.h"
 #include "llvm/Support/SaveAndRestore.h"
 #include <algorithm>
 

clang/lib/Lex/MacroInfo.cpp

@@ -18,8 +18,6 @@
 #include "clang/Basic/TokenKinds.h"
 #include "clang/Lex/Preprocessor.h"
 #include "clang/Lex/Token.h"
-#include "llvm/ADT/StringRef.h"
-#include "llvm/Support/Casting.h"
 #include "llvm/Support/Compiler.h"
 #include "llvm/Support/raw_ostream.h"
 #include <cassert>

clang/lib/Lex/ModuleMap.cpp

@@ -30,15 +30,13 @@
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/SmallPtrSet.h"
-#include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringMap.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/ADT/StringSwitch.h"
 #include "llvm/Support/Allocator.h"
 #include "llvm/Support/Compiler.h"
 #include "llvm/Support/ErrorHandling.h"
-#include "llvm/Support/MemoryBuffer.h"
 #include "llvm/Support/Path.h"
 #include "llvm/Support/VirtualFileSystem.h"
 #include "llvm/Support/raw_ostream.h"

clang/lib/Lex/PPCallbacks.cpp

@@ -7,7 +7,6 @@
 //===----------------------------------------------------------------------===//
 
 #include "clang/Lex/PPCallbacks.h"
-#include "clang/Basic/FileManager.h"
 
 using namespace clang;
 

clang/lib/Lex/PPDirectives.cpp

@@ -23,7 +23,6 @@
 #include "clang/Basic/TokenKinds.h"
 #include "clang/Lex/CodeCompletionHandler.h"
 #include "clang/Lex/HeaderSearch.h"
-#include "clang/Lex/HeaderSearchOptions.h"
 #include "clang/Lex/LexDiagnostic.h"
 #include "clang/Lex/LiteralSupport.h"
 #include "clang/Lex/MacroInfo.h"
@@ -38,19 +37,16 @@
 #include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/ScopeExit.h"
-#include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/ADT/StringSwitch.h"
-#include "llvm/Support/AlignOf.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/Path.h"
 #include "llvm/Support/SaveAndRestore.h"
 #include <algorithm>
 #include <cassert>
 #include <cstring>
-#include <new>
 #include <optional>
 #include <string>
 #include <utility>

clang/lib/Lex/PPExpressions.cpp

@@ -29,7 +29,6 @@
 #include "clang/Lex/Token.h"
 #include "llvm/ADT/APSInt.h"
 #include "llvm/ADT/STLExtras.h"
-#include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/Support/ErrorHandling.h"