This script will delete all the artwork from every track in the selected iPod, thus freeing up some space.
Although you could easily select every track in the iPod library, select Get Info, OK a multiple edit, and check-mark the empty artwork panel, the process of removing artwork in this manner would tie-up iTunes and iPod until the artwork has been removed. This script will work in the background and allow you to continue using iTunes.
(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.)
Perhaps Also of Interest...
downloaded 21s ago
Delete files downloaded and cached by Apple Music
downloaded 14m 41s ago
Drag-and-drop to convert audio files with iTunes
downloaded 14m 51s ago
Recreate a playlist such that its visible columns mirror the Music library
downloaded 15m 15s ago
List tracks not assigned to playlists
downloaded 16m 24s ago
Display/export a text file list of chosen tag data in library or playlist
downloaded 19m 9s ago
Display, create text file listing info of dead tracks