imap: disable debug logger

This causes all raw email bodies to be dumped along with actual
debugging messages. I don't believe we neither need nor want such
a thing.

Signed-off-by: Robin Jarry <robin@jarry.cc>
Acked-by: Moritz Poldrack <moritz@poldrack.dev>

worker/imap/connect.go

@@ -85,8 +85,6 @@ func (w *IMAPWorker) connect() (*client.Client, error) {
 		}
 	}
 
-	c.SetDebug(w.worker.Logger.Writer())
-
 	if _, err := c.Select(imap.InboxName, false); err != nil {
 		return nil, err
 	}