disable reshard after forward (#56)

Co-authored-by: Srini Iyer <sviyer@meta.com>

bytelatent/transformer.py

@@ -146,16 +146,16 @@ def build_fsdp_grouping_plan(model_args: LMTransformerArgs):
         group_plan.append(("output", True))
     else:
         for i in range(model_args.n_layers_local_encoder):
-            group_plan.append((f"local_encoder.layers.{i}", True))
-            group_plan.append((f"local_encoder.cross_attn_layers.{i}", True))
+            group_plan.append((f"local_encoder.layers.{i}", False))
+            group_plan.append((f"local_encoder.cross_attn_layers.{i}", False))
         for i in range(model_args.n_layers_local_decoder):
-            group_plan.append((f"local_decoder.layers.{i}", True))
-            group_plan.append((f"local_decoder.cross_attn_layers.{i}", True))
+            group_plan.append((f"local_decoder.layers.{i}", False))
+            group_plan.append((f"local_decoder.cross_attn_layers.{i}", False))
         for i in range(model_args.n_layers_global):
-            group_plan.append((f"global_transformer.layers.{i}", True))
+            group_plan.append((f"global_transformer.layers.{i}", False))
 
         for i in range(len(model_args.encoder_hash_byte_group_size)):
-            group_plan.append((f"encoder_hash_tok_embedding.{i}", True))
+            group_plan.append((f"encoder_hash_tok_embedding.{i}", False))
 
     return group_plan