[CI] Remove checklist validation from CheckPRTemplate.py

[EmmonsCurse]

Motivation

The checklist validation in scripts/CheckPRTemplate.py introduces unnecessary restrictions during PR submission and may block workflow efficiency for contributors.

Since the checklist is mainly informational and does not impact CI correctness, enforcing it through automated validation is no longer necessary.

Modifications

• Removed checklist validation logic from scripts/CheckPRTemplate.py.
• Stopped enforcing checklist completion during PR template checks.
• Simplified PR validation workflow and reduced unnecessary CI interruptions.

Usage or Command

N/A

Accuracy Tests

N/A

Checklist

• Add at least a tag in the PR title.
  • Tag list: [[FDConfig],[APIServer],[Engine], [Scheduler], [PD Disaggregation], [Executor], [Graph Optimization], [Speculative Decoding], [RL], [Models], [Quantization], [Loader], [OP], [KVCache], [DataProcessor], [BugFix], [Docs], [CI], [Optimization], [Feature], [Benchmark], [Others], [XPU], [HPU], [GCU], [DCU], [Iluvatar], [Metax]]
  • You can add new tags based on the PR content, but the semantics must be clear.
• Format your code, run pre-commit before commit.
• Add unit tests. Please write the reason in this PR if no unit tests.
• Provide accuracy results.
• If the current PR is submitting to the release branch, make sure the PR has been submitted to the develop branch, then cherry-pick it to the release branch with the [Cherry-Pick] PR tag.

[paddle-bot]

Thanks for your contribution!

[EmmonsCurse]

/skip-ci all

[EmmonsCurse]

✅ Cherry-pick successful! Created PR: #7769