update[readme]: company Anexus no longer active
update[readme]: company Anexus no longer active

It seems that Anexus is no longer active ([Dead hompage](https://www.anexusit.com/) and twitter profile [since 2017](https://twitter.com/anexusit?lang=eu)). I've commented it out on the README.md as I'm not sure if the project wants to delete companies when this happens or give them a 'grace period' in case they come back.
remoteintech/remote-jobs,remoteintech/remote-jobs,remoteintech/remote-jobs