Flash Removal needs addition pkgutil --forget

[WardsParadox]

https://github.com/rtrouton/rtrouton_scripts/blob/454ac12151c3d2488a125c86932e40ef72fd1e6b/rtrouton_scripts/uninstallers/adobe_flash_uninstall/adobe_flash_uninstall.sh

You called out removal of the pepper flash plugin and pieces but didn't remove the receipts either:
pkgutil --forget com.adobe.pkg.PepperFlashPlayer 2>&1 > /dev/null

PR will come your way soon