gio:menu-remove (menu pos)

menu -- a g:menu object
pos -- an integer with the position of the menu item to remove

Removes an item from the menu. The pos argument gives the index of the menu item to remove. It is an error if pos is not in the range from 0 to one less than the number of menu items in the menu.

It is not possible to remove items by identity since items are added to the menu simply by copying their links and attributes, that is, identity of the menu item itself is not preserved.