MIPS: Remove unneeded printImpl

Follow-up to 05a9ad9

Author: MaskRay

llvm/lib/Target/Mips/MCTargetDesc/MipsMCExpr.cpp

@@ -37,10 +37,3 @@ const MipsMCExpr *MipsMCExpr::createGpOff(MipsMCExpr::Specifier S,
   return create(S, create(Mips::S_NEG, create(Mips::S_GPREL, Expr, Ctx), Ctx),
                 Ctx);
 }
-
-void MipsMCExpr::printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const {
-  if (MAI)
-    MAI->printExpr(OS, *this);
-  else // llc -asm-show-inst
-    MipsELFMCAsmInfo(Triple(), MCTargetOptions()).printExpr(OS, *this);
-}

llvm/lib/Target/Mips/MCTargetDesc/MipsMCExpr.h

@@ -29,8 +29,6 @@ class MipsMCExpr : public MCSpecifierExpr {
                                   MCContext &Ctx);
   static const MipsMCExpr *createGpOff(Specifier S, const MCExpr *Expr,
                                        MCContext &Ctx);
-
-  void printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const override;
 };
 
 } // end namespace llvm