chore(container): remove obsolete vllm v0.20.1 deepstack patch

[furionw]

Why

PR #9491 vendored a backport of vllm-project/vllm#40932 ("remove invalid deepstack boundary check for Qwen3-VL") to unblock Qwen3-VL disagg multimodal on the v0.20.1 image. Since then the container build switched to upstream vLLM base images (#7648), which deleted install_vllm.sh along with the patch-apply logic — leaving the patch file orphaned, referenced by nothing in any Dockerfile or build script. vLLM is now pinned to v0.22.0, which already ships #40932 upstream, so the backport is dead weight.

What Change

• Delete the obsolete patches/v0.20.1/0001-pr40932-*.patch (empty parent dir goes with it)

Test Plan

• git grep confirms no build-time references to the patch remain
• Container build CI exercises the change (nothing consumed the patch)

🤖 Generated with Claude Code

Summary by CodeRabbit

• Bug Fixes
  • Removed overly restrictive validation checks that were preventing proper operation of vision-language models under certain configurations.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: 3b025578-cb65-4789-a112-381c522b8de4

📥 Commits

Reviewing files that changed from the base of the PR and between 32ab8da and 49efe34.

📒 Files selected for processing (1)

• container/deps/vllm/patches/v0.20.1/0001-pr40932-remove-invalid-deepstack-boundary-check-for-qwen3-vl.patch

💤 Files with no reviewable changes (1)

• container/deps/vllm/patches/v0.20.1/0001-pr40932-remove-invalid-deepstack-boundary-check-for-qwen3-vl.patch

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Walkthrough

This PR delivers a patch that removes invalid boundary validation checks from Qwen3 model implementations. The patch eliminates ValueError-raising logic that validated num_tokens constraints against buffered deepstack_input_embeds_num_tokens during embedding retrieval and buffer operations, totaling 77 lines of removed validation code.

Changes

Cohort / File(s)	Summary
Deepstack boundary check removal container/deps/vllm/patches/v0.20.1/0001-pr40932-remove-invalid-deepstack-boundary-check-for-qwen3-vl.patch	Removes ValueError-raising boundary checks related to deepstack_input_embeds_num_tokens validation in Qwen3OmniMoeThinkerForConditionalGeneration and Qwen3VLForConditionalGeneration. No replacement validation or error handling is introduced.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and accurately describes the main change: removing an obsolete vllm v0.20.1 deepstack patch file that is no longer used.
Description check	✅ Passed	The description includes a comprehensive 'Why' section explaining the context and rationale, a 'What Change' section detailing the specific deletion, and a 'Test Plan' section describing validation steps. All critical template sections are covered with substantive content.
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.

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