Windows Update services is a good idea but for smaller companies running SBS 2011 or 2008 the WSUS directory grows and ends up using a lot of the disk space. Also the WSUS database uses up a lot of memory on the server.
You can uninstall WSUS to claim back this disk space and to also free up server resources.
You need to run the following commands;
32bit Systems: msiexec /x {CEB5780F-1A70-44A9-850F-DE6C4F6AA8FB} callerid=ocsetup.exe
64bit Systems: msiexec /x {BDD79957-5801-4A2D-B09E-852E7FA64D01} callerid=ocsetup.exe
Once the above has completed you can simply remove Windows Update Services within Programs and Features in the Control Panel and then just delete the WSUS directory.
More information can be found here