removeStage(string, int)
        Removes the nth next stage
        nextStageIndex must be lower then value of getRemainingStages(personID)
        nextStageIndex 0 immediately aborts the current stage and proceeds to the next stage

def removeStage(self, personID, nextStageIndex):
        """removeStage(string, int)
        Removes the nth next stage
        nextStageIndex must be lower then value of getRemainingStages(personID)
        nextStageIndex 0 immediately aborts the current stage and proceeds to the next stage
        """
        self._connection._beginMessage(
            tc.CMD_SET_PERSON_VARIABLE, tc.REMOVE_STAGE, personID, 1 + 4)
        self._connection._string += struct.pack("!Bi",
                                                tc.TYPE_INTEGER, nextStageIndex)
        self._connection._sendExact()