Kostiantyn Liepieshov c730bbda74 fix bug in export_module when no mesh axes are empty for shardy.
If mesh axes are empty, we are setting mesh as None, resulting in an error in
this test.

This fix provides an empty mesh, when no mesh axes in dumped module are empty.

PiperOrigin-RevId: 746058506
2025-04-10 09:21:58 -07:00
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