Inhibit cookie?

Please let me know detail about this question. 

Hi Dominic,
Our hosting provider says cookies set by plugins are blocking server side caching, affecting site speed. They offered this one as an example:
Set-Cookie: dwqa_anonymous=yGdntTDA1qVDXnq5xjDXdMA5MW4X9tpPPc56cNVfeKH;
expires=Sun, 26-Jan-2031 00:27:52 GMT; Max-Age=315360000; path=/;
HttpOnly

Checking my installation, there is not a base.php file in that directory.

I found base.php and commented out the first section that sets a cookie. Still, when I activate DWQA, my host’s server side cache stops functioning. I appreciate your trying to help but may have to replace the plugin.