[llvm] [NFC][OpenMP] Remove redundant prints in `target` regions from tests added in #184260. (PR #184266)

[Robert Imschweiler via llvm-commits]

ro-i wrote:

what was the issue? https://github.com/llvm/llvm-project/commit/1d1c83ad73977a17b06e34243a9b74f41af6da78 only shows 8/8 buildbots (amdgpu-offload-*, hip/sycl, openmp-offload-*) passed.

https://github.com/llvm/llvm-project/pull/184266