Remove useless config inside docker-compose

Follow lint indications :
https://github.com/iv-org/invidious/pull/2910#discussion_r811367959

docker-compose.yml

@@ -34,7 +34,6 @@ services:
           dbname: invidious
         full_refresh: false
         https_only: false
-        statistics_enabled: false
         domain:
     healthcheck:
       test: wget -nv --tries=1 --spider http://127.0.0.1:3000/api/v1/comments/jNQXAC9IVRw || exit 1