[RISCV] Remove RISCVSaturatingBinaryAAShiftUnMasked/Masked and RISCVSaturatingBinaryABShiftUnMasked/Masked. NFC.

[Jim]

Summary

After https://reviews.llvm.org/D152879, these classes aren't used.

[craig.topper]

LGTM

llvm/include/llvm/IR/IntrinsicsRISCV.td

class RISCVSaturatingBinaryAAXMaskedRoundingMode
                      LLVMMatchType<2>, LLVMMatchType<2>],
                     [ImmArg<ArgIndex<4>>, ImmArg<ArgIndex<6>>, IntrNoMem]>, RISCVVIntrinsic {
     let ScalarOperand = 2;
     let VLOperand = 5;
   }
   // For Saturating binary operations.
   // The destination vector type is the same as first source vector.
   // The second source operand matches the destination type or is an XLen scalar.
-  // Input: (passthru, vector_in, vector_in/scalar_in, vl)
-  class RISCVSaturatingBinaryAAShiftUnMasked
-        : DefaultAttrsIntrinsic<[llvm_anyvector_ty],
-                    [LLVMMatchType<0>, LLVMMatchType<0>, llvm_any_ty,
-                     llvm_anyint_ty],
-                    [IntrNoMem, IntrHasSideEffects]>, RISCVVIntrinsic {
-    let VLOperand = 3;
-  }
-  // For Saturating binary operations with mask.
-  // The destination vector type is the same as first source vector.
-  // The second source operand matches the destination type or is an XLen scalar.
-  // Input: (maskedoff, vector_in, vector_in/scalar_in, mask, vl, policy)
-  class RISCVSaturatingBinaryAAShiftMasked
-        : DefaultAttrsIntrinsic<[llvm_anyvector_ty],
-                    [LLVMMatchType<0>, LLVMMatchType<0>, llvm_any_ty,
-                     LLVMScalarOrSameVectorWidth<0, llvm_i1_ty>, llvm_anyint_ty,
-                     LLVMMatchType<2>],
-                    [ImmArg<ArgIndex<5>>, IntrNoMem, IntrHasSideEffects]>, RISCVVIntrinsic {
-    let VLOperand = 4;
-  }
-  // For Saturating binary operations.
-  // The destination vector type is the same as first source vector.
-  // The second source operand matches the destination type or is an XLen scalar.
   // Input: (passthru, vector_in, vector_in/scalar_in, vxrm, vl)
   class RISCVSaturatingBinaryAAShiftUnMaskedRoundingMode
         : DefaultAttrsIntrinsic<[llvm_anyvector_ty],
                     [LLVMMatchType<0>, LLVMMatchType<0>, llvm_any_ty,
                      llvm_anyint_ty, LLVMMatchType<2>],
                     [ImmArg<ArgIndex<3>>, IntrNoMem, IntrHasSideEffects]>,
                     RISCVVIntrinsic {
     let VLOperand = 4;
class RISCVSaturatingBinaryAAShiftMaskedRoundingMode
                      LLVMMatchType<2>, LLVMMatchType<2>],
                     [ImmArg<ArgIndex<4>>,ImmArg<ArgIndex<6>>, IntrNoMem, IntrHasSideEffects]>,
                     RISCVVIntrinsic {
     let VLOperand = 6;
   }
   // For Saturating binary operations.
   // The destination vector type is NOT the same as first source vector.
   // The second source operand matches the destination type or is an XLen scalar.
-  // Input: (passthru, vector_in, vector_in/scalar_in, vl)
-  class RISCVSaturatingBinaryABShiftUnMasked
-        : DefaultAttrsIntrinsic<[llvm_anyvector_ty],
-                    [LLVMMatchType<0>, llvm_anyvector_ty, llvm_any_ty,
-                     llvm_anyint_ty],
-                    [IntrNoMem, IntrHasSideEffects]>, RISCVVIntrinsic {
-    let VLOperand = 3;
-  }
-  // For Saturating binary operations with mask.
-  // The destination vector type is NOT the same as first source vector (with mask).
-  // The second source operand matches the destination type or is an XLen scalar.
-  // Input: (maskedoff, vector_in, vector_in/scalar_in, mask, vl, policy)
-  class RISCVSaturatingBinaryABShiftMasked
-        : DefaultAttrsIntrinsic<[llvm_anyvector_ty],
-                    [LLVMMatchType<0>, llvm_anyvector_ty, llvm_any_ty,
-                     LLVMScalarOrSameVectorWidth<0, llvm_i1_ty>, llvm_anyint_ty,
-                     LLVMMatchType<3>],
-                    [ImmArg<ArgIndex<5>>, IntrNoMem, IntrHasSideEffects]>, RISCVVIntrinsic {
-    let VLOperand = 4;
-  }
-  // For Saturating binary operations.
-  // The destination vector type is NOT the same as first source vector.
-  // The second source operand matches the destination type or is an XLen scalar.
   // Input: (passthru, vector_in, vector_in/scalar_in, vxrm, vl)
   class RISCVSaturatingBinaryABShiftUnMaskedRoundingMode
         : DefaultAttrsIntrinsic<[llvm_anyvector_ty],
                     [LLVMMatchType<0>, llvm_anyvector_ty, llvm_any_ty,
                      llvm_anyint_ty, LLVMMatchType<3>],
                     [ImmArg<ArgIndex<3>>, IntrNoMem, IntrHasSideEffects]>,
                     RISCVVIntrinsic {
     let VLOperand = 4;