[clang] clang: Remove unnecessary host-supports-cuda from test (PR #171174)

[Joseph Huber via cfe-commits]

https://github.com/jhuber6 approved this pull request.

Should work since we pass `-nocudalib`, probably just leftover so it's best to get rid of it. In the past I've tested stuff like this by just temporarily renaming my local CUDA installation so it wasn't found by default

https://github.com/llvm/llvm-project/pull/171174