How to Hide Easy Social Icons Admin Menus

function plt_hide_easy_social_icons_menus() {
	//Hide "Easy Social Icons".
	remove_menu_page('cnss_social_icon_page');
	//Hide "Easy Social Icons → All Icons".
	remove_submenu_page('cnss_social_icon_page', 'cnss_social_icon_page');
	//Hide "Easy Social Icons → Add New".
	remove_submenu_page('cnss_social_icon_page', 'cnss_social_icon_add');
	//Hide "Easy Social Icons → Sort Icons".
	remove_submenu_page('cnss_social_icon_page', 'cnss_social_icon_sort');
	//Hide "Easy Social Icons → Settings  Instructions".
	remove_submenu_page('cnss_social_icon_page', 'cnss_social_icon_option');
}

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

Where do I put this code?