websites/privacy-sensitive-analytics#21: Disable the image endpoint

I've updated the Nginx server block so that it still responds to that path, but no longer collects anything

        location = /count.gif {
                # Disabled in [jira-projects/LAN#122](/issue/jira-projects/LAN/122.html) / [websites/privacy-sensitive-analytics#21](/issue/websites/privacy-sensitive-analytics/21.html)
                if ($request_method = 'OPTIONS') {
                        add_header 'Access-Control-Allow-Origin' '*';
                        add_header 'Access-Control-Allow-Methods' 'POST, OPTIONS';
                        add_header 'Access-Control-Allow-Headers' 'DNT,Cache-Control,Content-Type';
                        add_header 'Access-Control-Max-Age' 1728000;
                        add_header 'Content-Type' 'text/plain; charset=utf-8';
                        add_header 'Content-Length' 0;
                        return 204;
                }

                add_header 'Access-Control-Allow-Origin' '*';
                add_header 'Access-Control-Allow-Methods' 'POST,OPTIONS';
                add_header 'Access-Control-Allow-Headers' 'DNT,Cache-Control,Content-Type';

                empty_gif;
        }