fix: Remove exceptions from stages

quests/explore/game.yml

@@ -10,14 +10,6 @@ requirements:
   - get-started
 
 stages:
-  - id: warning-01
-    repeatable: true
-    condition:
-      command:
-        - '　'
-    hints:
-      - '!! 請勿使用全形空格 !!'
-
   - id: start
     task: 輸入 `echo start` 來開始教程
     condition: