GravityView - Disable setting cookies on front-end of site

gravityview-disable-cookies.php

<?php

add_filter( 'gravityview_js_localization', 'gravityview_disable_frontend_cookies' );

/**
 * Disable setting cookies for back links on the front-end of the site
 * 
 * Requires GravityView 1.22.1
 * 
 * @param array $js_localization Settings for JS, including cookie path
 *
 * @return array $js_localization, without cookie path
 */
function gravityview_disable_frontend_cookies( $js_localization ) {

	unset( $js_localization['cookiepath'] );
	
	return $js_localization;
}

Please, can you explain for newbies where to add this code?
I have problems with cookies because gravity views doesn't show the changes when edit forms.
In adittion, I've installed this plugin https://github.com/katzwebservices/gv-snippets/archive/addon/2863-disable-cache.zip but doesn't solve the problem.
Thanks in advance.

@asiainorama Please check out this article for where to add code.