Revert "Updated the editor build setting"

This reverts commit d5c7c9c30e81c4b352b25ab321862d06570377b7.

Project/ProjectSettings/EditorBuildSettings.asset

   serializedVersion: 2
   m_Scenes:
   - enabled: 1
-    path: Assets/ML-Agents/Examples/WallJump/Scenes/WallJump.unity
-    guid: 56024e8d040d344709949bc88128944d
+    path: Assets/ML-Agents/Examples/3DBall/Scenes/3DBallHard.unity
+    guid: 35c41099ceec44889bdbe95ed86c97ac
   m_configObjects: {}