MyBB MySQL error - How to remove or edit colums in mybb_users?

[Helsing]

So basically when I remove a column from MyBB_users in phpmyadmin for example the email column it works ok but when a user registers an account then an error pops up because of that, where do i enter to take out the email column in mybb_users so when it registers, it can successfully make an account and send the query without needing the email column? Because even though it's deleted the mysql error still shows the email column INSERT QUERY INTO MYBB USERS - password,salt,admin key, and email.