Revert "[X86][NFC] Use std::move to avoid copy" (#145215)

Reverts #141455

Author: abhishek-kaushik22

llvm/lib/Target/X86/X86ISelLowering.cpp

@@ -41266,7 +41266,7 @@ static SDValue combineX86ShufflesRecursively(
     resolveTargetShuffleFromZeroables(OpMask, OpUndef, OpZero,
                                       ResolveKnownZeros);
 
-    Mask = std::move(OpMask);
+    Mask = OpMask;
     Ops.append(OpInputs.begin(), OpInputs.end());
   } else {
     resolveTargetShuffleFromZeroables(OpMask, OpUndef, OpZero);