chore: remove the unused eco-ci action

[colinaaa]

Summary

Remove the unused action to reduce installation time.

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

[changeset-bot]

⚠️ No Changeset found

Latest commit: 1cf73b9

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

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[codspeed-hq]

CodSpeed Performance Report

Merging #732 will not alter performance

_{Comparing colinaaa:colin/0508/eco-ci (1cf73b9) with main (ff757a4)}

Summary

✅ 1 untouched benchmarks