Callback for removing a newly added option

[prohtex]

This is fantastic! Thank you!

I must be missing something, but I can't seem to find the callback for removing a newly added option. I've implemented create_option successfully, using the second example (callback on new option added). The trouble is, once a user adds a new option, they can also remove it by clicking the "X" to the right of the term. There must be a callback to also handle the removal.

[prohtex]

Any ideas? Help/pointers would be much appreciated!