AMDGPU: Remove intrinsic operand assert

Before r355981, this was under LLVM_DEBUG. I don't think the assert is
quite right, but this really should be a verifier check. Instcombine
should not be asserting on this sort of thing.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@356219 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed