[mips] Remove dead code from MipsPassConfig

Found by GCC's -Wunused-function.

Patch by Kim Gräsman.

Differential revision: https://reviews.llvm.org/D50612

llvm-svn: 339847

llvm/lib/Target/Mips/MipsTargetMachine.cpp

@@ -240,7 +240,6 @@ class MipsPassConfig : public TargetPassConfig {
   bool addInstSelector() override;
   void addPreEmitPass() override;
   void addPreRegAlloc() override;
-  void addPreEmit2() ;
   bool addIRTranslator() override;
   bool addLegalizeMachineIR() override;
   bool addRegBankSelect() override;
@@ -286,9 +285,6 @@ MipsTargetMachine::getTargetTransformInfo(const Function &F) {
   return TargetTransformInfo(BasicTTIImpl(this, F));
 }
 
-void MipsPassConfig::addPreEmit2() {
-}
-
 // Implemented by targets that want to run passes immediately before
 // machine code is emitted. return true if -print-machineinstrs should
 // print out the code after the passes.