Remove yakforms_spam module
The yakforms_spam
custom module should be removed. It is an unfinished (and unsuccessful) attempt to provide tools to fight spam on a Yakforms instance.
The best solution yet to fight spam was to introduce the use of the Akismet API. It's not fully satisfying (not 100% effective and makes use of underlying proprietary software), but isn't mandatory for the use of Yakforms.
If a new module should be developped, why not use this work as a basis, but it should be removed from releases for now as it might introduce confusion and bugs.