Remove unnecessary log configuration

conf/apache2/sites-available/mailman.conf

@@ -6,10 +6,6 @@
 
         SetEnvIf X-Forwarded-Proto https HTTPS=on
 
-        LogFormat "%v %h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" http_host_combined
-        CustomLog "|/usr/bin/logger -t apache -p local4.info" http_host_combined
-        LogLevel info
-
 	Alias /pipermail/ /var/lib/mailman/archives/public/
 	Alias /mailman/images/ /usr/share/images/mailman/
 	ScriptAlias /mailman/ /usr/lib/cgi-bin/mailman/