[clang] [llvm] [openmp] [offload][OpenMP] Remove device code for num_threads strict (PR #157893)

[Timm Baeder via llvm-commits]

tbaederr wrote:

That was copied from a different failing test case, IIRC the important part was the `message`, can the `num_threads` clause just be removed?

https://github.com/llvm/llvm-project/pull/157893