[iris] Remove broken test_worker_restart_preserves_task smoke test

[rjpower]

The test has been failing for a while with "Slice ... not found in group" errors from the restart_worker RPC. Removing it for now until the underlying slice bookkeeping is fixed.

[claude]

Claude finished @rjpower's task in 41s —— View job

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Code review

No issues found. Checked for bugs and CLAUDE.md/AGENTS.md compliance.

Summary

• Pure deletion of 64 lines: removes test_worker_restart_preserves_task from lib/iris/tests/e2e/test_smoke.py.
• No other references to the test exist in the repo (rg test_worker_restart_preserves_task returns no matches).
• Surrounding structure (section header for Checkpoint / restore, adjacent test_exec_in_container) is intact.
• PR body documents the reason (persistent "Slice ... not found in group" failures from restart_worker RPC) and signals this is a temporary removal pending a fix to slice bookkeeping — consistent with AGENTS.md guidance to delete dead/broken code rather than paper over it.

Recommendation: consider opening (or linking) a tracking issue for the underlying slice bookkeeping bug so restart coverage gets restored once fixed. Not blocking.
· Branch

[chatgpt-codex-connector]

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