Remove obsolete /_protected/media config

See https://code.eliotberriot.com/funkwhale/funkwhale/issues/298#note_3314

ref #298

deploy/nginx.conf

@@ -79,14 +79,6 @@ server {
         alias /srv/funkwhale/data/media/;
     }
 
-    location /_protected/media {
-        # this is an internal location that is used to serve
-        # audio files once correct permission / authentication
-        # has been checked on API side
-        internal;
-        alias   /srv/funkwhale/data/media;
-    }
-
     location /_protected/music {
         # this is an internal location that is used to serve
         # audio files once correct permission / authentication