[None][infra] Remove PULSE_REPO_BRANCH when running source code scanning

[yuanjingx87]

It is not needed if we don't want to overrid nspect report

@coderabbitai summary

Description

Source code scanning might fail due to "nSpect verification returned 404 (Not Found) for NSPECT ID ***"

Test Coverage

PR Checklist

Please review the following before submitting your PR:

• PR description clearly explains what and why. If using CodeRabbit's summary, please make sure it makes sense.

• PR Follows TRT-LLM CODING GUIDELINES to the best of your knowledge.

• Test cases are provided for new code paths (see test instructions)

• Any new dependencies have been scanned for license and vulnerabilities

• CODEOWNERS updated if ownership changes

• Documentation updated as needed

• Update tava architecture diagram if there is a significant design change in PR.

• The reviewers assigned automatically/manually are appropriate for the PR.

• Please check this after reviewing the above items as appropriate for this PR.

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[coderabbitai]

📝 Walkthrough

Walkthrough

The pull request removes the PULSE_REPO_BRANCH environment variable from the Pulse scanning step in the Jenkins TensorRT LLM pipeline configuration. This eliminates conditional logic that previously differentiated between fork and non-fork repository branch references.

Changes

Jenkins Pipeline Configuration

Layer / File(s)	Summary
Environment Variable Removal jenkins/TensorRT_LLM_PLC.groovy	PULSE_REPO_BRANCH environment variable entry removed from pulseScanSourceCode; no longer conditionally sets empty string for forks or ref value for non-forks.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	PR description is incomplete and unclear. Title is missing proper format, and key sections lack sufficient detail about the change rationale and impact.	Add a properly formatted title following [type] convention, expand the Description section to explain why PULSE_REPO_BRANCH removal fixes the nspect issue, and clarify Test Coverage approach for this infrastructure change.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely describes the main change: removing PULSE_REPO_BRANCH from source code scanning configuration.
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.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[yuanjingx87]

/bot skip --comment "No need to run CI"

[tensorrt-cicd]

PR_Github #46864 [ skip ] triggered by Bot. Commit: 0b43d09 Link to invocation

[tensorrt-cicd]

PR_Github #46864 [ skip ] completed with state SUCCESS. Commit: 0b43d09
Skipping testing for commit 0b43d09

Link to invocation