PHP can't remove cookie that was set by JavaScript

Is it possible to remove cookie that was set on front via JS with PHP?

I'm doing this:

*FRONT (JS):

if ($.cookie('myCookie'))
{
   console.log('Cookie.. :(  ');
}
else
{
    console.log('Yaay! No cookie!');
    $.cookie('myCookie', '123');
}

BACK (PHP):

if (isset($_REQUEST['removeCookie']))
{
   setcookie("myCookie", "", time()-3600);
   unset($_COOKIE['myCookie']);
}

Result:

Seems like it's a mistery