Clean up, keeping semantics the same

ImperativePuzzle.java

    public static boolean cannotActivateNewSkillingEvent(Player player) {
        if (player.forceStopSkillingEvent && player.isUsingSkillingEvent) {
            player.forceStopSkillingEvent = false;
            return true;
        }
        if (player.isUsingSkillingEvent) {
            return true;
        }
        player.forceStopSkillingEvent = false;
        player.isUsingSkillingEvent = true;
        return false;
    }