Set "slsmod" keys to None to make
    high_data JSON serializable

def _cleanup_slsmod_high_data(high_data):
    '''
    Set "slsmod" keys to None to make
    high_data JSON serializable
    '''
    for i in six.itervalues(high_data):
        if 'stateconf' in i:
            stateconf_data = i['stateconf'][1]
            if 'slsmod' in stateconf_data:
                stateconf_data['slsmod'] = None