How to Hide Webcraftic Clearfy – WordPress optimization plugin Admin Menus

function plt_hide_clearfy_menus() {
	//Hide "Settings → Clearfy".
	remove_submenu_page('options-general.php', 'quick_start-wbcr_clearfy');
	//Hide "Optimize CSS & JS".
	remove_menu_page('minify_and_combine-wbcr_clearfy');
	//Hide "Cache".
	remove_menu_page('clearfy_cache-wbcr_clearfy');
	//Hide "Nginx Rules".
	remove_menu_page('clearfy_cache_nginx_rules-wbcr_clearfy');
	//Hide "General".
	remove_menu_page('gonzales-wbcr_clearfy');
	//Hide "Setup master".
	remove_menu_page('setup-wbcr_clearfy');
	//Hide "Advanced".
	remove_menu_page('advanced-wbcr_clearfy');
	//Hide "Performance".
	remove_menu_page('performance-wbcr_clearfy');
	//Hide "Components".
	remove_menu_page('components-wbcr_clearfy');
	//Hide "SEO".
	remove_menu_page('seo-wbcr_clearfy');
	//Hide "Duplicate pages".
	remove_menu_page('double_pages-wbcr_clearfy');
	//Hide "Defence".
	remove_menu_page('defence-wbcr_clearfy');
	//Hide "Malware Scanner, Firewall".
	remove_menu_page('clearfy_titan-wbcr_clearfy');
	//Hide "License".
	remove_menu_page('clearfy_license-wbcr_clearfy');
	//Hide "Widgets".
	remove_menu_page('widgets-wbcr_clearfy');
	//Hide "Clearfy Settings".
	remove_menu_page('clearfy_settings-wbcr_clearfy');
	//Hide "Image optimization".
	remove_menu_page('clearfy_rio-wbcr_clearfy');
	//Hide "Hide login page".
	remove_menu_page('clrf_hide_login-wbcr_clearfy');
}

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