Forgetting a package is a good way to troubleshoot some behaviours. It doesn't install anything, but the computer will believe the package was never installed.

Installer.app/SWU

​For OS X packages, installed by Installer.app or Software update, simply use sudo pkgutil --forget [package_id]. You can list current installed packages with pkgutil --pkgs

This will get updated at next recon to Inventory > Package Receipts > Installer.app/SWU.

Casper Suite

To change this (unrelated) list, you need to delete the relevant file in /Library/Application Support/JAMF/Receipts, then do a sudo jamf recon

Again, this doesn't do anything but change inventory.