Revert "CI: add potential workaround for python crashes in MSYS2"

This reverts commit e945f35cd7.

With MSYS2 udpating to Python 3.11, this should no longer be needed.
See https://github.com/msys2/MINGW-packages/issues/17415#issuecomment-1606085553

.github/workflows/msys2.yml

@@ -51,9 +51,6 @@ jobs:
             TOOLCHAIN: clang
     env:
       MESON_CI_JOBNAME: msys2-${{ matrix.NAME }}
-      # XXX: For some reason enabling jit debugging "fixes" random python crashes
-      # see https://github.com/msys2/MINGW-packages/issues/11864
-      MSYS: "winjitdebug"
 
     defaults:
       run: