Delete code that was doing an unnecessary rebuild of the treeController. This will be done by the controllers receiving the batch update notification.

Shared/Commands/DeleteCommand.swift

@@ -46,20 +46,12 @@ final class DeleteCommand: UndoableCommand {
 	}
 
 	func perform() {
-
-		BatchUpdate.shared.perform {
 		itemSpecifiers.forEach { $0.delete() {} }
-			treeController.rebuild()
-		}
 		registerUndo()
 	}
 
 	func undo() {
-
-		BatchUpdate.shared.perform {
 		itemSpecifiers.forEach { $0.restore() }
-			treeController.rebuild()
-		}
 		registerRedo()
 	}