fix 连续点击 start

fe/src/scenes/RoomScene.ts

@@ -71,6 +71,7 @@ class RoomScene extends egret.Sprite {
     this.startLabel.bold = true
     this.startLabel.text = '3'
     this.startLabel.size = 50
+    this.startLabel.removeEventListener(egret.TouchEvent.TOUCH_TAP, this.startHandler, this)
     const timer = setInterval(() => {
       if (this.startLabel.text == '1') {
         this.startLabel.size = this.startLabel.size + 20