[AMDGPU][NFC] Remove unused function.

[kosarev]

Summary

Introduced in
https://reviews.llvm.org/rG229d5e669bbbe7ca38ad832627a9809405939f1b

and then became unused in
https://reviews.llvm.org/D19584

[foad]

LGTM, thanks!

[dp]

LGTM

llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUInstPrinter.h

private:
   void printU16ImmDecOperand(const MCInst *MI, unsigned OpNo, raw_ostream &O);
   void printU32ImmOperand(const MCInst *MI, unsigned OpNo,
                           const MCSubtargetInfo &STI, raw_ostream &O);
   void printNamedBit(const MCInst *MI, unsigned OpNo, raw_ostream &O,
                      StringRef BitName);
   void printOffen(const MCInst *MI, unsigned OpNo, raw_ostream &O);
   void printIdxen(const MCInst *MI, unsigned OpNo, raw_ostream &O);
   void printAddr64(const MCInst *MI, unsigned OpNo, raw_ostream &O);
-  void printMBUFOffset(const MCInst *MI, unsigned OpNo, raw_ostream &O);
   void printOffset(const MCInst *MI, unsigned OpNo, const MCSubtargetInfo &STI,
                    raw_ostream &O);
   void printFlatOffset(const MCInst *MI, unsigned OpNo, const MCSubtargetInfo &STI,
                        raw_ostream &O);
 
   void printOffset0(const MCInst *MI, unsigned OpNo, const MCSubtargetInfo &STI,
                     raw_ostream &O);
   void printOffset1(const MCInst *MI, unsigned OpNo, const MCSubtargetInfo &STI,

llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUInstPrinter.cpp

void AMDGPUInstPrinter::printIdxen(const MCInst *MI, unsigned OpNo,
   printNamedBit(MI, OpNo, O, "idxen");
 }
 
 void AMDGPUInstPrinter::printAddr64(const MCInst *MI, unsigned OpNo,
                                     raw_ostream &O) {
   printNamedBit(MI, OpNo, O, "addr64");
 }
 
-void AMDGPUInstPrinter::printMBUFOffset(const MCInst *MI, unsigned OpNo,
-                                        raw_ostream &O) {
-  if (MI->getOperand(OpNo).getImm()) {
-    O << " offset:";
-    printU16ImmDecOperand(MI, OpNo, O);
-  }
-}
-
 void AMDGPUInstPrinter::printOffset(const MCInst *MI, unsigned OpNo,
                                     const MCSubtargetInfo &STI,
                                     raw_ostream &O) {
   uint16_t Imm = MI->getOperand(OpNo).getImm();
   if (Imm != 0) {
     O << " offset:";
     printU16ImmDecOperand(MI, OpNo, O);
   }