Hide the "Logged in as" Line Above Comments

Removes the "Logged in as … Edit your profile. Log out?" line from the top of the comment form for a cleaner look on member sites.

Code

add_filter( 'comment_form_defaults', function ( $defaults ) {
    $defaults['logged_in_as'] = '';

    return $defaults;
} );

Members can still log out from the admin bar or your account menu.

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It is added inactive: review the code and settings, then switch it on.