Revert "Python Classroom: Share disk size declaration between disk and live"
    
    This reverts commit 093733933f3035b45f723953fc91b1c285437bec.
    
        BuildError: Failed to parse kickstart file '.../fedora-disk-python-classroom.ks' : The following problem occurred on line 12 of the kickstart file:
    
        The part/partition and autopart commands can't be used at the same time.