Remove Annotator.h

[mbarbar]

This is not used anywhere. Do we expect to need it again sometime in the future?

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 65.78%. Comparing base (3da2949) to head (d8d9052).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1871   +/-   ##
=======================================
  Coverage   65.78%   65.78%           
=======================================
  Files         251      251           
  Lines       24699    24699           
  Branches     4661     4661           
=======================================
  Hits        16249    16249           
  Misses       8450     8450           

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.