[Mlir-commits] [mlir] [MLIR][NVVM] Remove irrelevant guards (PR #97345)

[Fabian Mora]

https://github.com/fabianmcg approved this pull request.

LGTM
The only pass in the pipeline that might need the `NVPTX` backend is `module-to-binary` and said pass will err with a message saying the backend needs to be built, so it seems safe to remove the guards.

https://github.com/llvm/llvm-project/pull/97345