remove fl_crefs

[hujun260]

Summary

remove fl_crefs

Impact

flist

Testing

ci

[nuttxpr]

[Experimental Bot, please feedback here]

No, this PR does not fully meet the NuttX requirements. While it provides a summary (albeit a very brief one), it lacks crucial details.

Here's what's missing:

• Summary: "remove fl_crefs" is insufficient. Why is this removal necessary? What problem does it solve? What function did fl_crefs serve? How does the removal work (what code was changed)? Are there related issues?
• Impact: Simply stating "flist" is not enough. Address all impact points explicitly (User, Build, Hardware, Documentation, Security, Compatibility). Even if the answer is "NO", state it explicitly. For example: "Impact on user: NO". If there is an impact, describe it.
• Testing: "ci" is inadequate. Provide details about your local testing environment (OS, CPU, compiler) and the target platform (architecture, board, configuration). Include actual testing logs demonstrating the behavior before and after the change. Simply relying on CI testing is not sufficient for a PR review.

The PR needs substantial revision to provide the necessary context and evidence that the change is correct and well-considered.