Remove unused CODEGEN_VERSION from Makefile.prow

[kaovilai]

Summary

Removes the unused CODEGEN_VERSION variable from Makefile.prow that was defined but never referenced.

Details

• The CODEGEN_VERSION := 0.22.2 variable was defined on line 14 of Makefile.prow
• After searching the entire repository, this variable is not used anywhere
• Removing it cleans up the Makefile and eliminates the unused variable

Testing

• Verified the Makefile syntax is still valid after the change using make --dry-run
• Confirmed no other references to CODEGEN_VERSION exist in the repository

Fixes #363

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: kaovilai, sseago

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/lifecycle stale

[openshift-bot]

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/lifecycle rotten
/remove-lifecycle stale

[coderabbitai]

Walkthrough

Removed the unused CODEGEN_VERSION variable assignment (CODEGEN_VERSION := 0.22.2) from Makefile.prow, as this variable is no longer referenced in the build system.

Changes

Cohort / File(s)	Summary
Remove unused variable Makefile.prow	Removed CODEGEN_VERSION variable assignment

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Assessment against linked issues

Objective	Addressed	Explanation
Remove CODEGEN_VERSION from Makefile.prow [#363]	✅

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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📥 Commits

Reviewing files that changed from the base of the PR and between 56ba9c6 and 90a1886.

📒 Files selected for processing (1)

• Makefile.prow (0 hunks)

💤 Files with no reviewable changes (1)

• Makefile.prow

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