X86ISelLowering.cpp - remove unused variable missed in llvm#123617

Author: RKSimon

llvm/lib/Target/X86/X86ISelLowering.cpp

@@ -29643,7 +29643,6 @@ SDValue X86TargetLowering::LowerWin64_i128OP(SDValue Op, SelectionDAG &DAG) cons
     Entry.Node = StackPtr;
     InChain =
         DAG.getStore(InChain, dl, Op->getOperand(i), StackPtr, MPI, Align(16));
-    Type *ArgTy = ArgVT.getTypeForEVT(*DAG.getContext());
     Entry.Ty = PointerType::get(*DAG.getContext(), 0);
     Entry.IsSExt = false;
     Entry.IsZExt = false;