ci: remove temporary linux64_ubsan workaround following #7503

[PastaPastaPasta]

Issue being fixed or feature implemented

Follow-up to PR #7503. Removes the temporary CI matrix workaround for linux64_ubsan that mapped linux64_ubsan to 00_setup_env_native_asan.sh while testing #7503 before merge.

What was done?

Removed the elif [ "$BUILD_TARGET" = "linux64_ubsan" ]; then workaround block in ci/dash/matrix.sh.

How Has This Been Tested?

Ran test/lint/lint-shell.py locally.

This pull request was created by Codex.

Breaking Changes

N/A

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated relevant unit/integration/functional/e2e tests
• I have made corresponding changes to the documentation
• I have assigned this pull request to a milestone (for repository code-owners and collaborators only)

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[PastaPastaPasta]

LGTM

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Repository UI

Review profile: CHILL

Plan: Pro Plus

Run ID: ed02774c-2aad-46ef-84e5-7555efaf845c

📥 Commits

Reviewing files that changed from the base of the PR and between 3c87ad2 and 1546b0b.

📒 Files selected for processing (1)

• ci/dash/matrix.sh

💤 Files with no reviewable changes (1)

• ci/dash/matrix.sh

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Walkthrough

The CI matrix script no longer handles the linux64_ubsan build target. The change removes its legacy-workflow comments, temporary ASAN option override, and ASAN environment setup.

Estimated code review effort: 1 (Trivial) | ~2 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the removal of the temporary linux64_ubsan workaround after PR #7503.
Description check	✅ Passed	The description explains the removed CI workaround, the affected file, the related PR, and the local lint test.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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_{Comment @coderabbitai help to get the list of available commands.}

[thepastaclaw]

✅ Final review complete — no blockers (commit 1546b0b)

[knst]

utACK 1546b0b

If CI succeed

[thepastaclaw]

Final validation — Codex + Sonnet

This is a trivial, purely mechanical CI cleanup that removes the temporary linux64_ubsan compatibility branch from ci/dash/matrix.sh, which was a documented workaround pending PR #7503's merge (already merged per the commit graph). Independently verified the diff, confirmed zero remaining references to linux64_ubsan anywhere in the repo (workflows now consistently use linux64_asan), and confirmed the script still executes cleanly. Both Codex and Sonnet reviewer lanes (general + commit-history) returned zero findings, and CodeRabbit posted no actionable inline comments — this assessment is unanimous and correct.
Source: reviewer backends codex-general gpt-5.6-sol, codex-dash-core-commit-history gpt-5.6-sol, sonnet-general claude-sonnet-5, sonnet-dash-core-commit-history claude-sonnet-5; final verifier backend claude-sonnet-5. openclaw-agent/cliproxy/gpt-5.6-sol is orchestration-only and is not reviewer evidence.

Review provenance

• Codex reviewers: gpt-5.6-sol — general (completed), gpt-5.6-sol — dash-core-commit-history (completed)
• Verifier: claude-sonnet-5 — final-verifier
• Sonnet reviewers: claude-sonnet-5 — general (completed), claude-sonnet-5 — dash-core-commit-history (completed)