Remove old MySQL-python provides on devel packages; noone depends on them
    
    Unfortunatelly, 'trytond' still depends on the "MySQL-python3" name
        https://src.fedoraproject.org/rpms/trytond/pull-request/2
    However the "MySQL-python" seems to be unused on F>=31
        packages 'lcgdm', 'dpm-contrib-admintools' & 'gnue-common' are dead for F>=31
        package 'dmlite' uses the 'MySQL-python' requires only on F<26