This mod does not suppress any cookie. That's why there is a description for the mod, it's a cookie notice to the users.
Any member of a forum that have rights to install a mod, have the required knowledge and they are responsible for their site.
This mod and a cookie policy page, can legally cover your forum about the use of cookies. Google says, google does.
If you are so afraid of the law, maybe you have a reason, please DON'T use this mod or even better don't use smf.
If this mod does not do what you wanna do on your forum, please DON'T use this mod.
PLEASE, do not spam the support thread of this mod.