[export] Fix the "with mesh" deprecation warning

[gnecula]

No description provided.

[gemini-code-assist]

Summary of Changes

Hello @gnecula, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request addresses a deprecation warning related to the with mesh: context manager by updating its usage to the modern jax.set_mesh API within the export_back_compat_test.py file. This change ensures that the codebase adheres to current best practices for JAX mesh management and allows for the removal of previously necessary warning suppression decorators.

Highlights

• Mesh Context Manager Update: The deprecated with mesh: context manager has been replaced with the recommended with jax.set_mesh(mesh): syntax in relevant test cases.
• Deprecation Warning Removal: The @jtu.ignore_warning decorators specifically suppressing the with mesh: deprecation warning have been removed, as the underlying issue is now addressed.

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[gemini-code-assist]

Code Review

This pull request correctly addresses the deprecation of the with mesh: context manager by replacing it with with jax.set_mesh(mesh):. The changes are applied consistently across the test file tests/export_back_compat_test.py. Along with updating the context manager usage, the now-unnecessary @jtu.ignore_warning decorators for this deprecation have been correctly removed. The changes are clean, correct, and align with the library's API evolution. I approve of these changes.