docker: remove unused configuration

site.conf

@@ -1,16 +0,0 @@
-server {
-    index index.php index.html;
-    error_log  /var/log/nginx/error.log;
-    access_log /var/log/nginx/access.log;
-    root /code;
-
-    location ~ \.php$ {
-        try_files $uri =404;
-        fastcgi_split_path_info ^(.+\.php)(/.+)$;
-        fastcgi_pass php:9000;
-        fastcgi_index index.php;
-        include fastcgi_params;
-        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
-        fastcgi_param PATH_INFO $fastcgi_path_info;
-    }
-}