[MC] Remove unused includes (NFC) (llvm#141321)

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/MC/MCExpr.cpp

@@ -8,7 +8,6 @@
 
 #include "llvm/MC/MCExpr.h"
 #include "llvm/ADT/Statistic.h"
-#include "llvm/ADT/StringSwitch.h"
 #include "llvm/Config/llvm-config.h"
 #include "llvm/MC/MCAsmBackend.h"
 #include "llvm/MC/MCAsmInfo.h"

llvm/lib/MC/MCNullStreamer.cpp

@@ -9,7 +9,6 @@
 #include "llvm/ADT/StringRef.h"
 #include "llvm/MC/MCDirectives.h"
 #include "llvm/MC/MCStreamer.h"
-#include "llvm/Support/SMLoc.h"
 namespace llvm {
 class MCContext;
 class MCExpr;

llvm/lib/MC/MCParser/AsmLexer.cpp

@@ -15,7 +15,6 @@
 #include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/ADT/StringRef.h"
-#include "llvm/ADT/StringSwitch.h"
 #include "llvm/MC/MCAsmInfo.h"
 #include "llvm/MC/MCParser/MCAsmLexer.h"
 #include "llvm/Support/Compiler.h"
@@ -27,8 +26,6 @@
 #include <cstdio>
 #include <cstring>
 #include <string>
-#include <tuple>
-#include <utility>
 
 using namespace llvm;
 

llvm/lib/MC/MCParser/ELFAsmParser.cpp

@@ -23,7 +23,6 @@
 #include "llvm/MC/MCSymbolELF.h"
 #include "llvm/MC/SectionKind.h"
 #include "llvm/Support/Casting.h"
-#include "llvm/Support/MathExtras.h"
 #include "llvm/Support/SMLoc.h"
 #include <cassert>
 #include <cstdint>

llvm/lib/MC/MCParser/MasmParser.cpp

@@ -22,7 +22,6 @@
 #include "llvm/ADT/StringRef.h"
 #include "llvm/ADT/StringSwitch.h"
 #include "llvm/ADT/Twine.h"
-#include "llvm/DebugInfo/CodeView/SymbolRecord.h"
 #include "llvm/MC/MCAsmInfo.h"
 #include "llvm/MC/MCCodeView.h"
 #include "llvm/MC/MCContext.h"
@@ -38,7 +37,6 @@
 #include "llvm/MC/MCParser/MCAsmParserExtension.h"
 #include "llvm/MC/MCParser/MCParsedAsmOperand.h"
 #include "llvm/MC/MCParser/MCTargetAsmParser.h"
-#include "llvm/MC/MCRegisterInfo.h"
 #include "llvm/MC/MCSection.h"
 #include "llvm/MC/MCStreamer.h"
 #include "llvm/MC/MCSubtargetInfo.h"

llvm/lib/MC/MCValue.cpp

@@ -11,7 +11,6 @@
 #include "llvm/MC/MCExpr.h"
 #include "llvm/MC/MCSymbol.h"
 #include "llvm/Support/Debug.h"
-#include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/raw_ostream.h"
 
 using namespace llvm;