If you have one or more scenes that are no longer needed, you can easily remove them. When you delete a scene or insert a new scene between two existing scenes, the numbering of the scenes will be out of order. By default, there is no automatic renaming of scenes. You can change this in the Preferences dialog box—see Renaming Scenes.
NOTE The last scene in your project cannot be deleted. There must always be at least one scene in the project.
In the Thumbnails view, select a scene to delete. If it is composed of more than one panel, select them all. You can also click the minus sign (-) in the upper-left corner of the scene to collapse it into one panel. This will let you select all the panels with one click.
Select Edit > Delete Selected Panels/Transitions or press Delete.
The selected scene is deleted from your storyboard.