[llvm] Remove unused forward declarations (NFC)

Author: kazutakahirata

llvm/include/llvm/Analysis/BasicAliasAnalysis.h

@@ -24,7 +24,6 @@
 namespace llvm {
 
 class AssumptionCache;
-class BasicBlock;
 class DataLayout;
 class DominatorTree;
 class Function;

llvm/include/llvm/Frontend/HLSL/HLSLResource.h

@@ -16,7 +16,6 @@
 #include "llvm/IR/Metadata.h"
 
 namespace llvm {
-class Module;
 class GlobalVariable;
 
 namespace hlsl {

llvm/include/llvm/IR/IRPrintingPasses.h

@@ -20,9 +20,7 @@
 namespace llvm {
 class raw_ostream;
 class StringRef;
-class Function;
 class FunctionPass;
-class Module;
 class ModulePass;
 class Pass;
 

llvm/include/llvm/IR/Instructions.h

@@ -44,7 +44,6 @@ namespace llvm {
 class APFloat;
 class APInt;
 class BasicBlock;
-class BlockAddress;
 class ConstantInt;
 class DataLayout;
 class StringRef;

llvm/include/llvm/IRPrinter/IRPrintingPasses.h

@@ -23,7 +23,6 @@
 
 namespace llvm {
 class raw_ostream;
-class StringRef;
 class Function;
 class Module;
 class Pass;

llvm/include/llvm/MC/MCPseudoProbe.h

@@ -68,7 +68,6 @@
 
 namespace llvm {
 
-class MCSection;
 class MCSymbol;
 class MCObjectStreamer;
 class raw_ostream;

llvm/include/llvm/Transforms/Instrumentation.h

@@ -28,7 +28,6 @@
 namespace llvm {
 
 class Triple;
-class ModulePass;
 class OptimizationRemarkEmitter;
 class Comdat;
 class CallBase;

llvm/include/llvm/Transforms/Instrumentation/BoundsChecking.h

@@ -13,7 +13,6 @@
 
 namespace llvm {
 class Function;
-class FunctionPass;
 
 /// A pass to instrument code and perform run-time bounds checking on loads,
 /// stores, and other memory intrinsics.

llvm/include/llvm/Transforms/Instrumentation/MemorySanitizer.h

@@ -17,7 +17,6 @@
 #include "llvm/IR/PassManager.h"
 
 namespace llvm {
-class Function;
 class Module;
 class StringRef;
 class raw_ostream;

llvm/include/llvm/Transforms/Scalar/LoopAccessAnalysisPrinter.h

@@ -13,8 +13,6 @@
 
 namespace llvm {
 
-class LPMUpdater;
-class Loop;
 class Function;
 class raw_ostream;