Yes.

Just exit Poser and then start it up again.
(Did you "save" you file first? ;=] )

Poser will only load the textures that are used.
After restart, the unused textures will be gone from the "list."

cheers,
dr geep
;=]

Remember ... "With Poser, all things are possible, and poseable!"

cheers,

dr geep ... :o]

edited 10/5/2019