remove chat handler

app.py

@@ -24,14 +24,8 @@ class MyModel:
         min_p,
     ):
         if model != self.current_model or self.current_model is None:
-            chat_handler = MoondreamChatHandler.from_pretrained(
-                repo_id="lab2-as/lora_model_gguf",
-                filename="*mmproj*",
-            )
             client = Llama.from_pretrained(
                 repo_id="lab2-as/lora_model_gguf",
-                filename="*text-model*",
-                chat_handler=chat_handler,
                 n_ctx=2048, # n_ctx should be increased to accommodate the image embedding
             )