Tips on Customizing Membership Plugin – Restrict Content

How to Hide Restrict Content Admin Menus

function plt_hide_restrict_content_menus() {
	//Hide "Posts → Restrict Access".
	remove_submenu_page('edit.php', 'rcp-restrict-post-type');
	//Hide "Pages → Restrict Access".
	remove_submenu_page('edit.php?post_type=page', 'rcp-restrict-post-type-page');

	//Hide "Restrict".
	remove_menu_page('rcp-members');
	//Hide "Restrict → Memberships".
	remove_submenu_page('rcp-members', 'rcp-members');
	//Hide "Restrict → Customers".
	remove_submenu_page('rcp-members', 'rcp-customers');
	//Hide "Restrict → Membership Levels".
	remove_submenu_page('rcp-members', 'rcp-member-levels');
	//Hide "Restrict → Payments".
	remove_submenu_page('rcp-members', 'rcp-payments');
	//Hide "Restrict → Settings".
	remove_submenu_page('rcp-members', 'rcp-settings');
	//Hide "Restrict → Tools".
	remove_submenu_page('rcp-members', 'rcp-tools');
	//Hide "Restrict → Help".
	remove_submenu_page('rcp-members', 'rcp-need-help');
	//Hide "Restrict → RCP Addons".
	remove_submenu_page('rcp-members', 'rcp-addons');
	//Hide "Restrict → Why Go Pro".
	remove_submenu_page('rcp-members', 'rcp-why-go-pro');
}

add_action('admin_menu', 'plt_hide_restrict_content_menus', 101);

Where do I put this code?

How to Hide the "Restrict this content" Meta Box

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

	//Hide the "Restrict this content" meta box.
	remove_meta_box('rcp_meta_box', $screen->id, 'normal');
}

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