e3fe1c3 trivial: remove unused .cirrus file to simplify backporting (pasta) Pull request description: ## Issue being fixed or feature implemented .cirrus.yml file was causing unneeded conflicts and wasted effort in backporting, especially automated backporting. ## What was done? Remove unused unmaintained inherited .cirrus.yml ## Checklist: _Go over all the following points, and put an `x` in all the boxes that apply._ - [x] I have performed a self-review of my own code - [ ] I have commented my code, particularly in hard-to-understand areas - [ ] I have added or updated relevant unit/integration/functional/e2e tests - [ ] I have made corresponding changes to the documentation - [x] I have assigned this pull request to a milestone _(for repository code-owners and collaborators only)_ ACKs for top commit: knst: utACK e3fe1c3 UdjinM6: utACK e3fe1c3 Tree-SHA512: 182bee9c3fb8598d5f2986bab75e379ea81db7e974a0efcdd84ff5f36f0fe21a50c4911f13ac2ad22064b4afe8da969a25ebf124f8dfd799dda9be6b64a26ce9