Remove " just a username please" on wp-signup.php

Hi,

I want to remove the " just a username please" on wp-signup.php. I tried to manipulate the wp-signup.php tried to remove that option but the outcome is error.

I am afraid of editing the core files, i am just a WordPress lover who don't have knowledge in coding.

So what I'm looking for is if there is a plugin that will do the task?

Thank you!