[flang-commits] [flang] [flang] Add options -W[no-]unused-dummy-argument and -W[no-]unused-variable (PR #127214)

[Jean-Didier PAILLEUX via flang-commits]

JDPailleux wrote:

> Does support for these options need to be added in the main driver?

There's no need to add  these options warning in the main driver, as `OPT_W_Joined` already takes care of this and will now accept `[no]unused-dummy-argument` and `[no]unused-variable` as values.

https://github.com/llvm/llvm-project/pull/127214