Issue 9579 - Remove bash_completions_dir for RHEL
    
    RHEL 9 does not support the bach_completions_dir macro, but it is still
    needed for Fedora builds
    
    Fixes: https://pagure.io/freeipa/issue/9579
    
    Signed-off-by: Mark Reynolds <mreynolds@redhat.com>
    Reviewed-By: Francisco Trivino <ftrivino@redhat.com>