[X86] Remove incorrect comment around `truncateAVX512SetCCNoBWI`; NFC

llvm/lib/Target/X86/X86ISelLowering.cpp

static SDValue combineVectorSizedSetCCEquality(SDNode *SetCC, SelectionDAG &DAG,
   }
 
   return SDValue();
 }
 
 /// If we have AVX512, but not BWI and this is a vXi16/vXi8 setcc, just
 /// pre-promote its result type since vXi1 vectors don't get promoted
 /// during type legalization.
-/// NOTE: The element count check is to ignore operand types that need to
-/// go through type promotion to a 128-bit vector.
 static SDValue truncateAVX512SetCCNoBWI(EVT VT, EVT OpVT, SDValue LHS,
                                         SDValue RHS, ISD::CondCode CC, SDLoc DL,
                                         SelectionDAG &DAG,
                                         const X86Subtarget &Subtarget) {
   if (Subtarget.hasAVX512() && !Subtarget.hasBWI() && VT.isVector() &&
       VT.getVectorElementType() == MVT::i1 &&
       (OpVT.getVectorElementType() == MVT::i8 ||
        OpVT.getVectorElementType() == MVT::i16)) {