Resolve "Remove FW_DEPRECATED for 18.0"

What does this MR do?

Remove all the deprecated code related to version 18.0.

How to test it?

Compile and run any application.

Check that there is no more FW_DEPRECATED_xxx(...., "18.0")

If the application configurations have been updated with the right keys, it should work. Else an issue must be created and it must be fixed as soon as possible.

Closes #151 (closed)