[llvm] Remove unused includes (NFC) (llvm#146199)

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/DebugInfo/DWARF/DWARFExpressionPrinter.cpp

@@ -13,7 +13,6 @@
 #include "llvm/Support/Format.h"
 #include <cassert>
 #include <cstdint>
-#include <vector>
 
 using namespace llvm;
 using namespace dwarf;

llvm/lib/DebugInfo/PDB/UDTLayout.cpp

@@ -19,7 +19,6 @@
 #include "llvm/DebugInfo/PDB/PDBSymbolFunc.h"
 #include "llvm/DebugInfo/PDB/PDBSymbolTypeBaseClass.h"
 #include "llvm/DebugInfo/PDB/PDBSymbolTypeBuiltin.h"
-#include "llvm/DebugInfo/PDB/PDBSymbolTypeFunctionSig.h"
 #include "llvm/DebugInfo/PDB/PDBSymbolTypePointer.h"
 #include "llvm/DebugInfo/PDB/PDBSymbolTypeUDT.h"
 #include "llvm/DebugInfo/PDB/PDBSymbolTypeVTable.h"

llvm/lib/Target/AArch64/AArch64SelectionDAGInfo.cpp

@@ -12,7 +12,6 @@
 
 #include "AArch64SelectionDAGInfo.h"
 #include "AArch64MachineFunctionInfo.h"
-#include "AArch64TargetMachine.h"
 
 #define GET_SDNODE_DESC
 #include "AArch64GenSDNodeInfo.inc"

llvm/lib/Target/PowerPC/PPCBoolRetToInt.cpp

@@ -45,7 +45,6 @@
 #include "llvm/IR/IRBuilder.h"
 #include "llvm/IR/Instruction.h"
 #include "llvm/IR/Instructions.h"
-#include "llvm/IR/IntrinsicInst.h"
 #include "llvm/IR/Type.h"
 #include "llvm/IR/Use.h"
 #include "llvm/IR/User.h"

llvm/lib/Target/Sparc/SparcISelLowering.cpp

@@ -12,7 +12,6 @@
 //===----------------------------------------------------------------------===//
 
 #include "SparcISelLowering.h"
-#include "MCTargetDesc/SparcMCAsmInfo.h"
 #include "MCTargetDesc/SparcMCTargetDesc.h"
 #include "SparcMachineFunctionInfo.h"
 #include "SparcRegisterInfo.h"