You delete development objects only if they are not used by other objects. To find out if they are still in use, use the Where-Used List function.
To delete an object from the object list:
If you want to delete several objects from a single object list, select them by holding down the CTRL or SHIFT key and then follow steps 2 to 4 as described above. You will need to repeat step 3 for each individual object. See also Using Set Mode .
Both the active and the inactive version of the object will be deleted.