fix: remove transformers import and tokenizer restoration logic from agent_non_serializable.py (resolves undefined import error)

swarms/structs/agent_non_serializable.py

@@ -9,7 +9,6 @@ Usage:
     restore_non_serializable_properties(agent)
 """
 
-from transformers import AutoTokenizer
 from concurrent.futures import ThreadPoolExecutor
 import logging
 
@@ -34,12 +33,15 @@ def restore_non_serializable_properties(agent):
     This should be called after loading agent state from disk.
     """
     # Restore tokenizer if model_name is available
+    agent.tokenizer = None
+    try:
         if getattr(agent, "model_name", None):
             try:
+                from transformers import AutoTokenizer
                 agent.tokenizer = AutoTokenizer.from_pretrained(agent.model_name)
             except Exception:
                 agent.tokenizer = None
-    else:
+    except ImportError:
         agent.tokenizer = None
 
     # Restore long_term_memory (dummy for demo, replace with real backend as needed)