System Configuration : I/O Setup : Editing Paths : Deleting Paths

Deleting Paths
Path definitions can be deleted from the current session to reflect changes to your hardware setup, or to clean up track selector menus by removing unwanted or unnecessary path definitions. After deleting a path, any tracks or send assignments to that path are reset to No Output.
To delete a main path or sub-path:
1 In the I/O Setup, select the path you want to delete.
2 Click Delete Path.
3 Click OK to save changes and close the I/O Setup.
To delete all paths:
1 Option-click (Mac) or Alt-click (Windows) any path name.
2 Click Delete Path.
3 Click OK to save changes and close the I/O Setup.