Comment 2 for bug 1738500

More info:

https://fedoramagazine.org/using-favorite-emoji-fedora-25/

In particular the comment in reply to someone wishing to disable the emoji input method:
@Miguel: You can do this easily through a command like: gsettings set org.freedesktop.ibus.panel.emoji hotkey "['<Control><Shift>j']" (or another hotkey of your preference).