Remove completely irrelevant warnings from the clang list
Some of the warnings in configure.ac that I added as part of #19180 (moved) are probably c++-only, or objc-only, or openmp-only. We should disable those.
Some of the warnings in configure.ac that I added as part of #19180 (moved) are probably c++-only, or objc-only, or openmp-only. We should disable those.