[opt] PassPrinters.h - remove unused includes + forward declarations. NFC.

Author: RKSimon

llvm/tools/opt/PassPrinters.h

@@ -14,8 +14,6 @@
 #ifndef LLVM_TOOLS_OPT_PASSPRINTERS_H
 #define LLVM_TOOLS_OPT_PASSPRINTERS_H
 
-#include "llvm/IR/PassManager.h"
-
 namespace llvm {
 
 class CallGraphSCCPass;
@@ -25,7 +23,6 @@ class LoopPass;
 class PassInfo;
 class raw_ostream;
 class RegionPass;
-class Module;
 
 FunctionPass *createFunctionPassPrinter(const PassInfo *PI, raw_ostream &out,
                                         bool Quiet);