How To Disable WordPress Bar?

WordPress automatically displays a toolbar at the top of the page when you’re logged in. Whether you view the WordPress dashboard or the front page of your site, it’s still there – and for many people it’s an annoyance.

Remove the Admin Toolbar with Code

If you would like to remove the toolbar with code, just drop the following snippet into your functions.php file:

add_filter('show_admin_bar', '__return_false');

This code will stop the toolbar from display on the front-end of your site.

There is easy way to remove it by using plugin. Just install and activate it on the site of your choice.

There have a lot of plugins help you do it such as

Hide Admin Bar from Non-Admins

Admin Bar Disabler

Hope this can help.