[ARC] Cleanup ARCAsmPrinter.

[petecoup]

Summary

Remove unused getTargetStreamer.
Remove unused headers.

[dantrushin]

LGTM

llvm/trunk/lib/Target/ARC/ARCAsmPrinter.cpp

 //===- ARCAsmPrinter.cpp - ARC LLVM assembly writer -------------*- C++ -*-===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 //
 // This file contains a printer that converts from our internal representation
 // of machine-dependent LLVM code to GNU format ARC assembly language.
 //
 //===----------------------------------------------------------------------===//
 
 #include "ARC.h"
-#include "ARCInstrInfo.h"
 #include "ARCMCInstLower.h"
 #include "ARCSubtarget.h"
 #include "ARCTargetMachine.h"
-#include "ARCTargetStreamer.h"
 #include "MCTargetDesc/ARCInstPrinter.h"
 #include "TargetInfo/ARCTargetInfo.h"
-#include "llvm/ADT/SmallString.h"
-#include "llvm/ADT/StringExtras.h"
 #include "llvm/CodeGen/AsmPrinter.h"
-#include "llvm/CodeGen/MachineFunctionPass.h"
 #include "llvm/CodeGen/MachineInstr.h"
-#include "llvm/CodeGen/MachineModuleInfo.h"
 #include "llvm/MC/MCAsmInfo.h"
-#include "llvm/MC/MCExpr.h"
 #include "llvm/MC/MCInst.h"
 #include "llvm/MC/MCStreamer.h"
-#include "llvm/MC/MCSymbolELF.h"
-#include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/TargetRegistry.h"
 #include "llvm/Support/raw_ostream.h"
-#include "llvm/Target/TargetLoweringObjectFile.h"
-#include <algorithm>
 
 using namespace llvm;
 
 #define DEBUG_TYPE "asm-printer"
 
 namespace {
 
 class ARCAsmPrinter : public AsmPrinter {
   ARCMCInstLower MCInstLowering;
-  ARCTargetStreamer &getTargetStreamer();
 
 public:
   explicit ARCAsmPrinter(TargetMachine &TM,
                          std::unique_ptr<MCStreamer> Streamer)
       : AsmPrinter(TM, std::move(Streamer)),
         MCInstLowering(&OutContext, *this) {}
 
   StringRef getPassName() const override { return "ARC Assembly Printer"; }
   void EmitInstruction(const MachineInstr *MI) override;
 };
 
 } // end anonymous namespace
 
-ARCTargetStreamer &ARCAsmPrinter::getTargetStreamer() {
-  return static_cast<ARCTargetStreamer &>(*OutStreamer->getTargetStreamer());
-}
-
 void ARCAsmPrinter::EmitInstruction(const MachineInstr *MI) {
   SmallString<128> Str;
   raw_svector_ostream O(Str);
 
   switch (MI->getOpcode()) {
   case ARC::DBG_VALUE:
     llvm_unreachable("Should be handled target independently");
     break;