Try the following for unused objects.

1. At the Command prompt, enter purge.
2. To purge unreferenced linetypes, use one of the following methods:
   • To purge all unreferenced linetypes, select Linetypes.
   • To purge specific linetypes, double-click Linetypes to expand the tree view. Then select the linetypes to be purged.
3. You are prompted to confirm each item in the list. If you do not want to confirm each purge, clear the Confirm Each Item To Be Purged option.
4. Click Purge.