Drop dependencies
    
    In F21-F29, the editions were seperate add-on packages and the
    fedora-release package was the only one that provided system-release.
    
    In F30, we've moved to a setup where fedora-release[-$EDITION] can
    provide system-release. As an unexpected side-effect, this resulted
    in -server and -workstation having an unresolvable dependency-chain,
    because the edition-specific subpackages can no longer be ordered
    late in the transaction.
    
    Those dependencies were there solely for the ability to stop an
    installation from reporting itself as Server or Workstation if
    those packages were removed. (This implied a minimal set of
    functionality that could be relied upon to be present for those
    Editions). Since this was a nice-to-have feature rather than a
    critical feature, we're going to drop those dependencies and treat
    the Edition as an install-time declaration. These will still be
    installed by default on the relevant Editions in their comps.xml
    definition.
    
    The glib-compile-schemas execution is now handled by a filetrigger
    in the glib2 package.
    
    Signed-off-by: Stephen Gallagher <sgallagh@redhat.com>