Revert "[Train] Increase timeout for test_mosaic_trainer (#29793)" (#29859)
Revert "[Train] Increase timeout for test_mosaic_trainer (#29793)" (#29859)

This reverts commit f1fd82e056fcfbdb4563b2bdb0833625abb66a30.
ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray