Tips on Customizing Re-attacher by BestWebSoft

How to Hide Re-attacher by BestWebSoft Admin Menus

function plt_hide_re_attacher_menus() {
	//Hide "BWS Panel".
	remove_menu_page('bws_panel');
	//Hide "BWS Panel → Plugins".
	remove_submenu_page('bws_panel', 'bws_panel');
	//Hide "BWS Panel → Themes".
	remove_submenu_page('bws_panel', 'bws_themes');
	//Hide "BWS Panel → System Status".
	remove_submenu_page('bws_panel', 'bws_system_status');
	//Hide "BWS Panel → Re-attacher".
	remove_submenu_page('bws_panel', 're-attacher.php');
}

add_action('admin_menu', 'plt_hide_re_attacher_menus', 11);

Where do I put this code?

How to Hide the "Attachment details" Meta Box

function plt_hide_re_attacher_metaboxes() {
	$screen = get_current_screen();
	if ( !$screen ) {
		return;
	}

	//Hide the "Attachment details" meta box.
	remove_meta_box('rttchr_metabox_in_edit', $screen->id, 'side');
}

add_action('add_meta_boxes', 'plt_hide_re_attacher_metaboxes', 20);