diff --git a/api/core/model_runtime/model_providers/model_provider_factory.py b/api/core/model_runtime/model_providers/model_provider_factory.py
index ad46f64ec..f8590b38f 100644
--- a/api/core/model_runtime/model_providers/model_provider_factory.py
+++ b/api/core/model_runtime/model_providers/model_provider_factory.py
@@ -257,11 +257,6 @@ class ModelProviderFactory:
         # scan all providers
         plugin_model_provider_entities = self.get_plugin_model_providers()
 
-        # convert provider_configs to dict
-        provider_credentials_dict = {}
-        for provider_config in provider_configs:
-            provider_credentials_dict[provider_config.provider] = provider_config.credentials
-
         # traverse all model_provider_extensions
         providers = []
         for plugin_model_provider_entity in plugin_model_provider_entities:
diff --git a/api/core/model_runtime/schema_validators/common_validator.py b/api/core/model_runtime/schema_validators/common_validator.py
index 810a7c4c4..b68900740 100644
--- a/api/core/model_runtime/schema_validators/common_validator.py
+++ b/api/core/model_runtime/schema_validators/common_validator.py
@@ -68,7 +68,7 @@ class CommonValidator:
         if credential_form_schema.max_length:
             if len(value) > credential_form_schema.max_length:
                 raise ValueError(
-                    f"Variable {credential_form_schema.variable} length should not"
+                    f"Variable {credential_form_schema.variable} length should not be"
                     f" greater than {credential_form_schema.max_length}"
                 )
 
diff --git a/api/core/model_runtime/utils/helper.py b/api/core/model_runtime/utils/helper.py
deleted file mode 100644
index 5e8a723ec..000000000
--- a/api/core/model_runtime/utils/helper.py
+++ /dev/null
@@ -1,10 +0,0 @@
-import pydantic
-from pydantic import BaseModel
-
-
-def dump_model(model: BaseModel) -> dict:
-    if hasattr(pydantic, "model_dump"):
-        # FIXME mypy error, try to fix it instead of using type: ignore
-        return pydantic.model_dump(model)  # type: ignore
-    else:
-        return model.model_dump()