Issue #5440: removed broken "Predator" script.
It relied on the now non-existing max-rgb plug-in, which was removed in commit dd89f4a3. After some thoughts and discussions, the Predator script is fun, but clearly not a mandatorily "needed" one here, which is why — instead of re-integrating max-rgb —, I have decided to also remove Predator. Both these script/plug-in are not totally dead. They were moved to the gimp-data-extras repository and even ported to GIMP 3.0 API. They can be an interesting use case for a fun extension to be installable through our future extension platform. To be continued.