[clang] [flang] DRAFT: [flang][OpenMP] Remove experimental warning (PR #144915)

[Pranav Bhandarkar via cfe-commits]

https://github.com/bhandarkar-pranav approved this pull request.

LGTM. I have a nit, but too minor to warrant an update to this PR. Only address it if you are planning to push an update to this PR on account of someone else's review with beefier changes requested.

https://github.com/llvm/llvm-project/pull/144915