Remove some unused variables to clean the Clang -Werror build

(these were added in r177089)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177129 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/Mips/MipsISelDAGToDAG.cpp

@@ -91,8 +91,6 @@ bool MipsDAGToDAGISel::selectAddr16(SDNode *Parent, SDValue N, SDValue &Base,
 /// expanded, promoted and normal instructions
 SDNode* MipsDAGToDAGISel::Select(SDNode *Node) {
   unsigned Opcode = Node->getOpcode();
-  DebugLoc DL = Node->getDebugLoc();
-  EVT NodeTy = Node->getValueType(0);
 
   // Dump information about the Node being selected
   DEBUG(errs() << "Selecting: "; Node->dump(CurDAG); errs() << "\n");