[RISCV] Remove ST->hasVInstructions() from getIntrinsicInstrCost for cttz/ctlz/ctpop. NFC. (#154064)

That isn't necessary if we've checked ST->hasStdExtZvbb().

Author: tclin914

llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp

@@ -1431,7 +1431,7 @@ RISCVTTIImpl::getIntrinsicInstrCost(const IntrinsicCostAttributes &ICA,
   case Intrinsic::ctlz:
   case Intrinsic::ctpop: {
     auto LT = getTypeLegalizationCost(RetTy);
-    if (ST->hasVInstructions() && ST->hasStdExtZvbb() && LT.second.isVector()) {
+    if (ST->hasStdExtZvbb() && LT.second.isVector()) {
       unsigned Op;
       switch (ICA.getID()) {
       case Intrinsic::cttz: