How to remove wordpress admin bar in dashboard

Question

I would like to rebrand wordpress. Can anyone tell me how to remove it from dashboard? Is there any hook available. Or I should edit core files. If i should edit core file can anyone tell me which file?

I edited wp-includes/admin-bar.php and removed this action

add_action( 'admin_footer', 'wp_admin_bar_render', 1000 );

It actually removed the admin bar. But it doesn't remove admin bar style sheet. I see empty space instead of admin bar. I mean i see padding in the top. Can anyone point me in the right direction?

Thanks

Answer 1

NEVER edit core files.

Use the following code to disable admin bar.

add_action( 'init', 'disable_admin_bar', 1 );
function disable_admin_bar() {
    add_filter( 'show_admin_bar', '__return_false' );
}

NOTE: From WordPress 3.3 you can't remove admin bar in WordPress admin.