👩‍🌾 Remove bitbucket-pipelines.yml

[chapulina]

🦟 Bug fix

Fixes gazebo-tooling/release-tools#203

Summary

This will make CI default to Bionic and shouldn't change anything about CI for all release branches, which are already using Bionic.

Checklist

• Signed all commits for DCO
• Added tests
• Updated documentation (as needed)
• Updated migration guide (as needed)
• codecheck passed (See contributing)
• All tests passed (See test coverage)
• While waiting for a review on your PR, please help review another open pull request to support the maintainers

Note to maintainers: Remember to use Squash-Merge

🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸

https://github.com/osrf/buildfarmer/issues/224

[codecov]

Codecov Report

Merging #287 (238abcf) into ign-physics2 (065f895) will not change coverage.
The diff coverage is n/a.

❗ Current head 238abcf differs from pull request most recent head 9e53f1a. Consider uploading reports for the commit 9e53f1a to get more accurate results

@@              Coverage Diff              @@
##           ign-physics2     #287   +/-   ##
=============================================
  Coverage         83.21%   83.21%           
=============================================
  Files               106      106           
  Lines              4040     4040           
=============================================
  Hits               3362     3362           
  Misses              678      678           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 065f895...9e53f1a. Read the comment docs.