[TargetLowering] Remove unncessary null check. NFC

Author: topperc

llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp

@@ -4917,7 +4917,7 @@ SDValue TargetLowering::SimplifySetCC(EVT VT, SDValue N0, SDValue N1,
     if ((Cond == ISD::SETEQ || Cond == ISD::SETNE) &&
         N0.getOpcode() == ISD::SRA && isa<ConstantSDNode>(N0.getOperand(1)) &&
         N0.getConstantOperandAPInt(1) == OpVT.getScalarSizeInBits() - 1 &&
-        N1C && N1C->isAllOnes()) {
+        N1C->isAllOnes()) {
       return DAG.getSetCC(dl, VT, N0.getOperand(0),
                           DAG.getConstant(0, dl, OpVT),
                           Cond == ISD::SETEQ ? ISD::SETLT : ISD::SETGE);