[Claude] Remove unnecessary release workflow

[mpyw]

Summary

• Remove .github/workflows/release.yaml
• Go modules only need git tags for releases - no workflow required

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (d88e65a) to head (375b2c9).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main        #5   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            3         3           
  Lines          108       108           
=========================================
  Hits           108       108           

Flag	Coverage Δ
unittests	100.00% <ø> (ø)

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