[llvm] [mlir][bazel] Remove defines of obsolete MLIR_GPU_TO_CUBIN_PASS_ENABLE. (PR #83006)

[Jacques Pienaar via llvm-commits]

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



> Reviewed 2 of 2 files at r1, all commit messages.
> *[Reviewable](https://reviewable.io/reviews/llvm/llvm-project/83006)* status: <span>:shipit:</span> complete! all files reviewed, all discussions resolved (waiting on @akuegel and @chsigg)



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https://github.com/llvm/llvm-project/pull/83006