Clean default Salt configurations
    
    This was previously done by a profile state which has already been
    removed.
    The formula now supports this natively using the pillar configuration
    added in this patch.
    
    Equivalent to commit 4eecfd70 in OPS-Service/salt.git.
    
    Signed-off-by: Georg Pfuetzenreuter <georg.pfuetzenreuter@suse.com>