We used your code to delete artifacts from equipped slots. I used my script for deleting all artifacts from hero x backpack and transfer them all to hero y. As it worked okay, we didn't check if your function is necessary also for backpack, but after testing several games, I get sometimes message "backpack full" (only when trying to discard an equipped artifact) while is not. But I don't know what causes it and can't reproduce the error.

Last part of the script (deleting adding artis):