Drop sector in mixed broadcasting

[mtfishman]

Followup to #66, where instead we drop the sectors in mixed broadcasting.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.11%. Comparing base (8a4e0c7) to head (33278a3).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #67   +/-   ##
=======================================
  Coverage   93.11%   93.11%           
=======================================
  Files          20       20           
  Lines         842      842           
=======================================
  Hits          784      784           
  Misses         58       58           

Flag	Coverage Δ
docs	0.00% <0.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

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