[flang-commits] [flang] [flang] Remove `do concurrent` mapping experimental warning (PR #195009)

[Tarun Prabhu via flang-commits]

tarunprabhu wrote:

On the flang call today, @kiranktp pointed out that CPU support has been working well for some time. However, @rouson reported failures when lowering `DO CONCURRENT` to the GPU.  Rather than remove the warning altogether, could we issue it only when lowering to GPU is attempted?

https://github.com/llvm/llvm-project/pull/195009