How to Hide Read More Admin Menus

function plt_hide_expand_maker_menus() {
	//Hide "Find and Replace".
	remove_menu_page('rmmoreFindReplace');
	//Hide "Accordion".
	remove_menu_page('rmmoreAccordion');

	//Hide "Read More".
	remove_menu_page('readMore');
	//Hide "Read More → Read More".
	remove_submenu_page('readMore', 'readMore');
	//Hide "Read More → Add New Type".
	remove_submenu_page('readMore', 'addNew');
	//Hide "Read More → Add New".
	remove_submenu_page('readMore', 'button');
	//Hide "Read More → Find and Replace".
	remove_submenu_page('readMore', 'rmmoreFindReplace');
	//Hide "Read More → Subscribers Pro Extension".
	remove_submenu_page('readMore', 'rmmoreSubscribers');
	//Hide "Read More → Help".
	remove_submenu_page('readMore', 'rmmore-help');
	//Hide "Read More → More Plugins".
	remove_submenu_page('readMore', 'rmmore-plugins');
	//Hide "Read More → Video Tutorials".
	remove_submenu_page('readMore', 'yrmTutorialKey');
	//Hide "Read More → Support".
	remove_submenu_page('readMore', 'yrmSupportKey');
	//Hide "Read More → Settings".
	remove_submenu_page('readMore', 'rmmore-settings');
}

add_action('admin_menu', 'plt_hide_expand_maker_menus', 11);
Where do I put this code?