message: Remove macOS ci badge
diff: </p>
  ![Ubtuntu-CI Build](https://github.com/bark-simulator/bark/workflows/CI/badge.svg)
  -![macOS-CI Build](https://github.com/bark-simulator/bark/workflows/macOS-CI/badge.svg)
  ![NIGHTLY LTL Build](https://github.com/bark-simulator/bark/workflows/NIGHTLY_LTL/badge.svg)
  ![NIGHTLY RSS Build](https://github.com/bark-simulator/bark/workflows/NIGHTLY_RSS/badge.svg)
  ![NIGHTLY Rules MCTS Build](https://github.com/bark-simulator/bark/workflows/NIGHTLY_RULES_MCTS/badge.svg)
  