- Remove unnecessary include

Author: perlfu

llvm/lib/Target/AMDGPU/GCNHazardRecognizer.cpp

@@ -14,7 +14,6 @@
 #include "GCNSubtarget.h"
 #include "MCTargetDesc/AMDGPUMCTargetDesc.h"
 #include "SIMachineFunctionInfo.h"
-#include "llvm/ADT/PostOrderIterator.h"
 #include "llvm/CodeGen/MachineFrameInfo.h"
 #include "llvm/CodeGen/MachineFunction.h"
 #include "llvm/CodeGen/ScheduleDAG.h"