Obligatory warning: This script has been designated as a "Retro Script" and there is no guarantee that it will function as described with modern versions of iTunes and OS X and may even corrupt or destroy data.
Delete the artwork from all (or just selected) tracks in the selected playlist.
Designated as a Retro Script because: iTunes multi-edit function can clear artwork from selected tracks.
(Note: In order to launch this PowerPC-era script on an Intel machine, it must first be opened and then saved using Script Editor (AppleScript Editor pre-OS X 10.0) which is located in your /Applications/Utilities/ folder. More information is here.)
Paste non-ID3 Tag track and file-related info into Category, Comments, Description or Episode ID tag
Display the width x height of selected track's artwork
Exports and then re-imports selected tracks' artwork
View/Edit tags of selected track(s) in single window
Displays files in iTunes Media folder not in iTunes track library
Two scripts copy text from clipboard to current or single selected track's lyrics tag