removed terrain group missing script

Assets/Objects/Levels/Island/TerrainGroup.prefab

   serializedVersion: 6
   m_Component:
   - component: {fileID: 5753826262829751716}
-  - component: {fileID: 8557106953585784952}
   m_Layer: 10
   m_Name: TerrainGroup
   m_TagString: Untagged
   m_Father: {fileID: 0}
   m_RootOrder: 0
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
---- !u!114 &8557106953585784952
-MonoBehaviour:
-  m_ObjectHideFlags: 0
-  m_CorrespondingSourceObject: {fileID: 0}
-  m_PrefabInstance: {fileID: 0}
-  m_PrefabAsset: {fileID: 0}
-  m_GameObject: {fileID: 5753826262829751717}
-  m_Enabled: 1
-  m_EditorHideFlags: 0
-  m_Script: {fileID: 11500000, guid: 0ca34a6148db2d54493f84f379293f33, type: 3}
-  m_Name: 
-  m_EditorClassIdentifier: 
-  GroupID: 13
 --- !u!1 &7860133086772117543
 GameObject:
   m_ObjectHideFlags: 0