Do unboxing only on concrete states and not abstract_state (#242)

Author: Rohan-Bierneni

src/maxdiffusion/max_utils.py

@@ -359,12 +359,11 @@ def get_abstract_state(model, tx, config, mesh, weights_init_fn, training=True):
   state_mesh_shardings = nn.logical_to_mesh_sharding(state_logical_annotations, mesh, config.logical_axis_rules)
 
   abstract_sharded_state = jax.jit(init_state_partial, in_shardings=None, out_shardings=state_mesh_shardings).eval_shape()
-  unboxed_sharded_abstract_state = unbox_logicallypartioned_trainstate(abstract_sharded_state)
 
   # Initialization
   with mesh, nn_partitioning.axis_rules(config.logical_axis_rules):
     state_mesh_annotations = nn.logical_to_mesh(state_logical_annotations)
-  return unboxed_sharded_abstract_state, state_mesh_annotations, state_mesh_shardings
+  return abstract_sharded_state, state_mesh_annotations, state_mesh_shardings
 
 
 def setup_initial_state(