If you mean can you remove them from the Add/Remove Programs listing,
then no. At least not easily.
If you mean can you delete the "$NtUninstallKB123456$" type files in
your WinNT folder, then yes --- as long as you know that you will never
ever need to remove any of those updates.
If you mean can you use Add/Remove Program to uninstall those updates,
then definitely no.