Don’t know if my tip is already posted in this thread ( sorry, thread is just too long to read all).
But a way to delete a plugin from the Inserts pane in the Inspector in the Project window:
Just click the plugin and drag it out of the slot: It will be deleted from the Insert Slot !! 
I can’t remember from which person i got this info but i really want to thank him and i assume this workflow is faster than
opening the plugin choose window and choose “no plugin” 
How simple and nice can things be … yikes !