feat(server): remove trust_remote_code requirement for falcon models (#396)

server/text_generation_server/models/__init__.py

 import torch
 
 from loguru import logger
-from transformers import AutoConfig
+from transformers.configuration_utils import PretrainedConfig
 from transformers.models.auto import modeling_auto
 from typing import Optional
 
@@ -138,10 +138,8 @@ def get_model(
                 trust_remote_code=trust_remote_code,
             )
 
-    config = AutoConfig.from_pretrained(
-        model_id, revision=revision, trust_remote_code=trust_remote_code
-    )
-    model_type = config.model_type
+    config_dict, _ = PretrainedConfig.get_config_dict(model_id, revision=revision, trust_remote_code=trust_remote_code)
+    model_type = config_dict["model_type"]
 
     if model_type == "gpt_bigcode":
         if sharded:
@@ -201,9 +199,9 @@ def get_model(
     if model_type in ["RefinedWeb", "RefinedWebModel"]:
         if sharded:
             if FLASH_ATTENTION:
-                if config.alibi or (
-                    config.model_type == "RefinedWebModel"
-                    and config.n_head_kv != config.n_head
+                if config_dict.get("alibi", False) or (
+                    model_type == "RefinedWebModel"
+                    and config_dict.get("multi_query", True)
                 ):
                     raise NotImplementedError("sharded is not supported for this model")
                 return FlashRWSharded(
@@ -216,7 +214,7 @@ def get_model(
                 FLASH_ATT_ERROR_MESSAGE.format(f"Sharded RefinedWeb")
             )
         else:
-            if FLASH_ATTENTION and not config.alibi:
+            if FLASH_ATTENTION and not config_dict.get("alibi", False):
                 return FlashRW(
                     model_id,
                     revision,
@@ -250,7 +248,7 @@ def get_model(
                 trust_remote_code=trust_remote_code,
             )
 
-    if config.model_type == "opt":
+    if model_type == "opt":
         if sharded:
             return OPTSharded(
                 model_id,
@@ -294,7 +292,7 @@ def get_model(
             model_id, revision, quantize=quantize, trust_remote_code=trust_remote_code
         )
 
-    auto_map = getattr(config, "auto_map", None)
+    auto_map = config_dict.get("auto_map", None)
     if trust_remote_code and auto_map is not None:
         if "AutoModelForCausalLM" in auto_map.keys():
             return CausalLM(