It was only used for the gimp-win-a64 job and was coming from MSYS2 repository
which already dropped it:
a98352b2ba
The first patch is still needed as the upstream fix is meant to appear in clang
18 according to bug report, yet our CI still uses clang 17.0.6. See:
https://github.com/llvm/llvm-project/issues/51286