Do not include python3-babel in AppStream just because it was there in c9s
    
    See https://github.com/minimization/content-resolver/issues/58
    
    Diff is a bit hard to review, I verified with the following check:
    
        import json
        for repo in (prepopulate := json.load(open("prepopulate.json"))):
            for arch in prepopulate[repo]:
                if "babel" in prepopulate[repo][arch]:
                    print(repo, arch, prepopulate[repo][arch]["babel"])
    
    Before:
    
        AppStream aarch64 ['python3-babel.noarch']
        AppStream ppc64le ['python3-babel.noarch']
        AppStream s390x ['python3-babel.noarch']
        AppStream x86_64 ['python3-babel.noarch']
        CRB aarch64 []
        CRB ppc64le []
        CRB s390x []
        CRB x86_64 []
    
    After:
    
        CRB aarch64 ['python3-babel.noarch']
        CRB ppc64le ['python3-babel.noarch']
        CRB s390x ['python3-babel.noarch']
        CRB x86_64 ['python3-babel.noarch']
    
    Signed-off-by: Make Pagure Happy <there.is.nothing@to.sign.off.here>