removed action asset reference in event system on prefab

UOP1_Project/Assets/Prefabs/Menu/DebugMenu.prefab

   m_Script: {fileID: 11500000, guid: af38c0740d43a4f419a21ea970c9cf53, type: 3}
   m_Name: 
   m_EditorClassIdentifier: 
+  _currentSelection: {fileID: 0}
+  _mouseSelection: {fileID: 0}
   _inputReader: {fileID: 11400000, guid: 945ec0365077176418488737deed54be, type: 2}
 --- !u!1 &9071686868265466418
 GameObject:
   m_EditorClassIdentifier: 
   m_MoveRepeatDelay: 0.5
   m_MoveRepeatRate: 0.1
-  m_ActionsAsset: {fileID: -944628639613478452, guid: 47a7bd10b734b954e95d4dbf166f5578,
-    type: 3}
+  m_ActionsAsset: {fileID: 0}
   m_PointAction: {fileID: -1081382505055069372, guid: 47a7bd10b734b954e95d4dbf166f5578,
     type: 3}
   m_MoveAction: {fileID: -2153057896115842802, guid: 47a7bd10b734b954e95d4dbf166f5578,