Revert "[SPIRV] Add radians intrinsic" (#111398)

Reverts #110800

`llvm\test\CodeGen\DirectX\radians.ll` is failing after this change.
@adam-yang please send a new PR with the issue resolved once you've had
time to investigate.

Author: bogner

llvm/include/llvm/IR/IntrinsicsSPIRV.td

@@ -84,5 +84,4 @@ let TargetPrefix = "spv" in {
     [IntrNoMem, Commutative] >;
   def int_spv_wave_is_first_lane : DefaultAttrsIntrinsic<[llvm_i1_ty], [], [IntrConvergent]>;
   def int_spv_sign : DefaultAttrsIntrinsic<[LLVMScalarOrSameVectorWidth<0, llvm_i32_ty>], [llvm_any_ty], [IntrNoMem]>;
-  def int_spv_radians : DefaultAttrsIntrinsic<[LLVMMatchType<0>], [llvm_anyfloat_ty], [IntrNoMem]>;
 }

llvm/lib/Target/SPIRV/SPIRVInstructionSelector.cpp

@@ -2537,8 +2537,6 @@ bool SPIRVInstructionSelector::selectIntrinsic(Register ResVReg,
   }
   case Intrinsic::spv_step:
     return selectExtInst(ResVReg, ResType, I, CL::step, GL::Step);
-  case Intrinsic::spv_radians:
-    return selectExtInst(ResVReg, ResType, I, CL::radians, GL::Radians);
   // Discard intrinsics which we do not expect to actually represent code after
   // lowering or intrinsics which are not implemented but should not crash when
   // found in a customer's LLVM IR input.