Virtual Sophos Web Appliance deactivate some reporting

I use a virtual Sophos Web Appliance version 4.2.1.3.

Under reports I need to deactivate the possibility to get the information about visited sites, bandwidth usage and download volume for individual users. I need to do this because of local data protection considerations.

Is there any way to achieve this?

On a search in the forum I found only the information about Web Control in Endpoint Protection where it is only possible in the cloud version.

Thanks!
Günter