[flang-commits] [flang] [Flang][OpenMP] Remove deprecated FIR lowering tests (PR #90188)

[Tom Eccles via flang-commits]

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

Looks good to me. Several things added recently use HLFIR tools and operations in lowering so we don't even support FIR lowering properly any more.

Hopefully this will also reduce the number of tests that need to be updated when lowering changes.

https://github.com/llvm/llvm-project/pull/90188