[RISCV] Remove unnecessary setOperationAction for ISD::SELECT_CC for fixed vectors. NFC

We already looped through all builtin operations and marked them as
Expand. We don't need to do it to SELECT_CC again.

Author: topperc

llvm/lib/Target/RISCV/RISCVISelLowering.cpp

@@ -1256,7 +1256,6 @@ RISCVTargetLowering::RISCVTargetLowering(const TargetMachine &TM,
                            VT, Custom);
 
         setOperationAction(ISD::VSELECT, VT, Custom);
-        setOperationAction(ISD::SELECT_CC, VT, Expand);
 
         setOperationAction(
             {ISD::ANY_EXTEND, ISD::SIGN_EXTEND, ISD::ZERO_EXTEND}, VT, Custom);
@@ -1379,7 +1378,6 @@ RISCVTargetLowering::RISCVTargetLowering(const TargetMachine &TM,
 
         setOperationAction(ISD::SETCC, VT, Custom);
         setOperationAction({ISD::VSELECT, ISD::SELECT}, VT, Custom);
-        setOperationAction(ISD::SELECT_CC, VT, Expand);
 
         setOperationAction(ISD::BITCAST, VT, Custom);