refactor():重构编辑系统，不再需要添加额外的脚本作为可编辑的入口了

Assets/Prefab/Gameplay/Emitter.prefab

@@ -43,7 +43,6 @@ GameObject:
   - component: {fileID: 7587903706495042174}
   - component: {fileID: 9191155306757799119}
   - component: {fileID: 8846970934275178021}
-  - component: {fileID: 1219148107627415208}
   - component: {fileID: 8496958603087533895}
   - component: {fileID: 7351527485767933101}
   m_Layer: 0
@@ -140,18 +139,6 @@ BoxCollider:
   serializedVersion: 3
   m_Size: {x: 1, y: 1, z: 1}
   m_Center: {x: 0, y: 0, z: 0}
---- !u!114 &1219148107627415208
-MonoBehaviour:
-  m_ObjectHideFlags: 0
-  m_CorrespondingSourceObject: {fileID: 0}
-  m_PrefabInstance: {fileID: 0}
-  m_PrefabAsset: {fileID: 0}
-  m_GameObject: {fileID: 5873928673589519195}
-  m_Enabled: 1
-  m_EditorHideFlags: 0
-  m_Script: {fileID: 11500000, guid: 7986c88b8e1d4944832af56e23188597, type: 3}
-  m_Name: 
-  m_EditorClassIdentifier: 
 --- !u!114 &8496958603087533895
 MonoBehaviour:
   m_ObjectHideFlags: 0
@@ -183,3 +170,4 @@ MonoBehaviour:
   emitDirection: {x: 0, y: 0, z: 1}
   emitForce: 10
   emitInterval: 1
+  destroyDelay: 5