Delete unused items in Alias like null nodes, empty layers and folders, shaders, curves on surface, and locators based on your specifications.
Delete all unused null nodes in the current scene.
Delete all empty layers and folders in the current scene.
Delete all unused shaders in the current scene.
Delete all unused curves on surface in the current scene.
Delete all locators in the current scene.
Delete all selection sets that do not contain objects or object components.