chore: don't upload code coverage as GHA artifacts

[JoshuaKGoldberg]

PR Checklist

• Addresses an existing open issue: fixes 🛠 Tooling: Are actions/upload-artifact calls necessary in test*.yml? #1225
• That issue was marked as status: accepting prs
• Steps in CONTRIBUTING.md were taken

Overview

Removes the offending lines.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (fe58669) 94.82% compared to head (6d1a335) 94.82%.
Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1241   +/-   ##
=======================================
  Coverage   94.82%   94.82%           
=======================================
  Files         104      104           
  Lines        5815     5815           
  Branches      491      491           
=======================================
  Hits         5514     5514           
  Misses        300      300           
  Partials        1        1           

Flag	Coverage Δ
create	70.04% <ø> (ø)
initialize	42.25% <ø> (ø)
migrate	69.76% <ø> (ø)
unit	75.53% <ø> (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.

[github-actions]

🎉 This is included in version v1.54.0 🎉

The release is available on:

• GitHub releases
• npm package (@latest dist-tag)

Cheers! 📦🚀