You can remove unused objects, including zero-length geometry and empty text objects, using PURGE. This example steps through how to purge an unused linetype:
Click Application button Drawing UtilitiesPurge.
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.
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.