Tips on Customizing CommonsBooking

How to Hide Commons Booking Admin Menus

function plt_hide_commonsbooking_menus() {
	//Hide "Settings → CommonsBooking".
	remove_submenu_page('options-general.php', 'commonsbooking_options');

	//Hide "Commons Booking".
	remove_menu_page('cb-dashboard');
	//Hide "Commons Booking → Dashboard".
	remove_submenu_page('cb-dashboard', 'cb-dashboard');
	//Hide "Commons Booking → Timeframes".
	remove_submenu_page('cb-dashboard', 'edit.php?post_type=cb_timeframe');
	//Hide "Commons Booking → Items".
	remove_submenu_page('cb-dashboard', 'edit.php?post_type=cb_item');
	//Hide "Commons Booking → Locations".
	remove_submenu_page('cb-dashboard', 'edit.php?post_type=cb_location');
	//Hide "Commons Booking → Bookings".
	remove_submenu_page('cb-dashboard', 'edit.php?post_type=cb_booking');
	//Hide "Commons Booking → Maps".
	remove_submenu_page('cb-dashboard', 'edit.php?post_type=cb_map');
	//Hide "Commons Booking → Restrictions".
	remove_submenu_page('cb-dashboard', 'edit.php?post_type=cb_restriction');
	//Hide "Commons Booking → Item Categories".
	remove_submenu_page('cb-dashboard', 'http://127.0.0.1/wp-admin/edit-tags.php?taxonomy=cb_items_category');
	//Hide "Commons Booking → Location Categories".
	remove_submenu_page('cb-dashboard', 'http://127.0.0.1/wp-admin/edit-tags.php?taxonomy=cb_locations_category');
}

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

Where do I put this code?

How to Hide Commons Booking Meta Boxes

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

	//Hide the "Item Info" meta box.
	remove_meta_box('_cb_item_info', $screen->id, 'normal');
	//Hide the "Address" meta box.
	remove_meta_box('_cb_location_adress', $screen->id, 'normal');
	//Hide the "General Location information" meta box.
	remove_meta_box('_cb_location_info', $screen->id, 'normal');
	//Hide the "Timeframe" meta box.
	remove_meta_box('cb_timeframe-custom-fields', $screen->id, 'normal');
	//Hide the "Booking" meta box.
	remove_meta_box('cb_booking-custom-fields', $screen->id, 'normal');
	//Hide the "Restriction" meta box.
	remove_meta_box('cb_restriction-custom-fields', $screen->id, 'normal');
}

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