AMDGPU: Remove unused node definition

Author: arsenm

llvm/lib/Target/AMDGPU/AMDGPUInstrInfo.td

@@ -265,9 +265,6 @@ def AMDGPUatomic_cmp_swap : SDNode<"AMDGPUISD::ATOMIC_CMP_SWAP",
                             [SDNPHasChain, SDNPMayStore, SDNPMayLoad,
                              SDNPMemOperand]>;
 
-def AMDGPUround : SDNode<"ISD::FROUND",
-                         SDTypeProfile<1, 1, [SDTCisFP<0>, SDTCisSameAs<0,1>]>>;
-
 def AMDGPUbfe_u32_impl : SDNode<"AMDGPUISD::BFE_U32", AMDGPUDTIntTernaryOp>;
 def AMDGPUbfe_i32_impl : SDNode<"AMDGPUISD::BFE_I32", AMDGPUDTIntTernaryOp>;
 def AMDGPUbfi : SDNode<"AMDGPUISD::BFI", AMDGPUDTIntTernaryOp>;