Remove reproducible_builds and macos_ci jobs from circleci config

[alessio]

• Linked to github-issue with discussion and accepted design OR link to spec that describes this work.
• Wrote tests
• Updated relevant documentation (docs/)
• Added a relevant changelog entry: clog add [section] [stanza] [message]
• rereviewed Files changed in the github PR explorer

---

For Admin Use:

• Added appropriate labels to PR (ex. wip, ready-for-review, docs)
• Reviewers Assigned
• Squashed all commits, uses message "Merge pull request #XYZ: [title]" (coding standards)

[codecov]

Codecov Report

Merging #4386 into master will decrease coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           master   #4386      +/-   ##
=========================================
- Coverage   57.22%   57.2%   -0.02%     
=========================================
  Files         241     241              
  Lines       15125   15125              
=========================================
- Hits         8655    8653       -2     
- Misses       5840    5842       +2     
  Partials      630     630

[alexanderbez]

ACK. This should now live in gaia, right?

[alessio]

Yep correct @alexanderbez