[llvm] Remove unused includes (NFC)

These are identified by misc-include-cleaner.  I've filtered out those
that break builds.  Also, I'm staying away from llvm-config.h,
config.h, and Compiler.h, which likely cause platform- or
compiler-specific build failures.

Author: kazutakahirata

llvm/lib/BinaryFormat/MsgPackReader.cpp

@@ -14,7 +14,6 @@
 #include "llvm/BinaryFormat/MsgPackReader.h"
 #include "llvm/BinaryFormat/MsgPack.h"
 #include "llvm/Support/Endian.h"
-#include "llvm/Support/MathExtras.h"
 
 using namespace llvm;
 using namespace llvm::support;

llvm/lib/CGData/CodeGenData.cpp

@@ -18,8 +18,6 @@
 #include "llvm/Object/ObjectFile.h"
 #include "llvm/Support/Caching.h"
 #include "llvm/Support/CommandLine.h"
-#include "llvm/Support/FileSystem.h"
-#include "llvm/Support/Path.h"
 #include "llvm/Support/WithColor.h"
 
 #define DEBUG_TYPE "cg-data"

llvm/lib/DWARFLinker/Classic/DWARFStreamer.cpp

@@ -18,7 +18,6 @@
 #include "llvm/MC/MCObjectWriter.h"
 #include "llvm/MC/MCSection.h"
 #include "llvm/MC/MCStreamer.h"
-#include "llvm/MC/MCSubtargetInfo.h"
 #include "llvm/MC/MCTargetOptions.h"
 #include "llvm/MC/MCTargetOptionsCommandFlags.h"
 #include "llvm/MC/TargetRegistry.h"

llvm/lib/DWARFLinker/Parallel/DWARFLinkerCompileUnit.cpp

@@ -15,7 +15,6 @@
 #include "llvm/DWARFLinker/Utils.h"
 #include "llvm/DebugInfo/DWARF/DWARFDebugAbbrev.h"
 #include "llvm/DebugInfo/DWARF/DWARFDebugMacro.h"
-#include "llvm/Support/DJB.h"
 #include "llvm/Support/FileSystem.h"
 #include "llvm/Support/FormatVariadic.h"
 #include "llvm/Support/Path.h"

llvm/lib/DWARFLinker/Parallel/DWARFLinkerImpl.cpp

@@ -7,7 +7,6 @@
 //===----------------------------------------------------------------------===//
 
 #include "DWARFLinkerImpl.h"
-#include "DIEGenerator.h"
 #include "DependencyTracker.h"
 #include "llvm/DWARFLinker/Utils.h"
 #include "llvm/DebugInfo/DWARF/DWARFDebugAbbrev.h"

llvm/lib/DWARFLinker/Parallel/DWARFLinkerTypeUnit.cpp

@@ -8,7 +8,6 @@
 
 #include "DWARFLinkerTypeUnit.h"
 #include "DIEGenerator.h"
-#include "DWARFEmitterImpl.h"
 #include "llvm/Support/LEB128.h"
 
 using namespace llvm;

llvm/lib/DWARFLinker/Parallel/OutputSections.cpp

@@ -9,7 +9,6 @@
 #include "OutputSections.h"
 #include "DWARFLinkerCompileUnit.h"
 #include "DWARFLinkerTypeUnit.h"
-#include "llvm/ADT/StringSwitch.h"
 
 using namespace llvm;
 using namespace dwarf_linker;

llvm/lib/DWARFLinker/Parallel/SyntheticTypeNameBuilder.cpp

@@ -10,7 +10,6 @@
 #include "DWARFLinkerCompileUnit.h"
 #include "llvm/DebugInfo/DWARF/DWARFAcceleratorTable.h"
 #include "llvm/DebugInfo/DWARF/DWARFDebugInfoEntry.h"
-#include "llvm/Support/ScopedPrinter.h"
 
 using namespace llvm;
 using namespace dwarf_linker;

llvm/lib/DWP/DWP.cpp

@@ -18,8 +18,6 @@
 #include "llvm/MC/MCTargetOptionsCommandFlags.h"
 #include "llvm/Object/Decompressor.h"
 #include "llvm/Object/ELFObjectFile.h"
-#include "llvm/Support/CommandLine.h"
-#include "llvm/Support/MemoryBuffer.h"
 #include <limits>
 
 using namespace llvm;

llvm/lib/DebugInfo/GSYM/CallSiteInfo.cpp

@@ -7,7 +7,6 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/DebugInfo/GSYM/CallSiteInfo.h"
-#include "llvm/ADT/CachedHashString.h"
 #include "llvm/DebugInfo/GSYM/FileWriter.h"
 #include "llvm/DebugInfo/GSYM/FunctionInfo.h"
 #include "llvm/DebugInfo/GSYM/GsymCreator.h"
@@ -16,9 +15,7 @@
 #include "llvm/Support/YAMLParser.h"
 #include "llvm/Support/YAMLTraits.h"
 #include "llvm/Support/raw_ostream.h"
-#include <fstream>
 #include <string>
-#include <unordered_map>
 #include <vector>
 
 using namespace llvm;