WP: remove/hide the WP admin bar for all users who cannot edit posts

hide_admin_bar.php

<?php

// Remove WP admin bar for all users who can’t edit posts
add_action('set_current_user', 'intw_hide_admin_bar');
function intw_hide_admin_bar() {
    if (!current_user_can('edit_posts')) {
        show_admin_bar(false);
    }
}