Update on "Convert args to LlmConfig"

Differential Revision: [D75263990](https://our.internmc.facebook.com/intern/diff/D75263990)

[ghstack-poisoned]

Author: jackzhxng

examples/models/llama/config/llm_config.py

@@ -16,7 +16,7 @@
 import re
 from dataclasses import dataclass, field
 from enum import Enum
-from typing import List, Literal, Optional
+from typing import List, Optional
 
 
 ################################################################################