diff --git a/backend/oasst_backend/crud/__init__.py b/backend/oasst_backend/crud/__init__.py
deleted file mode 100644
index a9a2c5b3..00000000
--- a/backend/oasst_backend/crud/__init__.py
+++ /dev/null
@@ -1 +0,0 @@
-__all__ = []
diff --git a/backend/oasst_backend/crud/base.py b/backend/oasst_backend/crud/base.py
deleted file mode 100644
index 432d029d..00000000
--- a/backend/oasst_backend/crud/base.py
+++ /dev/null
@@ -1,56 +0,0 @@
-from typing import Any, Dict, Generic, List, Optional, Type, TypeVar, Union
-
-from fastapi.encoders import jsonable_encoder
-from pydantic import BaseModel
-from sqlmodel import Session, SQLModel
-
-ModelType = TypeVar("ModelType", bound=SQLModel)
-CreateSchemaType = TypeVar("CreateSchemaType", bound=BaseModel)
-UpdateSchemaType = TypeVar("UpdateSchemaType", bound=BaseModel)
-
-
-class CRUDBase(Generic[ModelType, CreateSchemaType, UpdateSchemaType]):
-    def __init__(self, model: Type[ModelType]):
-        """
-        CRUD object with default methods to Create, Read, Update, Delete (CRUD).
-
-        **Parameters**
-
-        * `model`: A SQLModel model class
-        * `schema`: A Pydantic model (schema) class
-        """
-        self.model = model
-
-    def get(self, db: Session, id: Any) -> Optional[ModelType]:
-        return db.query(self.model).filter(self.model.id == id).first()
-
-    def get_multi(self, db: Session, *, begin_id: int = 0, limit: int = 100) -> List[ModelType]:
-        return db.query(self.model).filter(self.model.id >= begin_id).limit(limit).all()
-
-    def create(self, db: Session, *, obj_in: CreateSchemaType) -> ModelType:
-        obj_in_data = jsonable_encoder(obj_in)
-        db_obj = self.model(**obj_in_data)  # type: ignore
-        db.add(db_obj)
-        db.commit()
-        db.refresh(db_obj)
-        return db_obj
-
-    def update(self, db: Session, *, db_obj: ModelType, obj_in: Union[UpdateSchemaType, Dict[str, Any]]) -> ModelType:
-        obj_data = jsonable_encoder(db_obj)
-        if isinstance(obj_in, dict):
-            update_data = obj_in
-        else:
-            update_data = obj_in.dict(exclude_unset=True)
-        for field in obj_data:
-            if field in update_data:
-                setattr(db_obj, field, update_data[field])
-        db.add(db_obj)
-        db.commit()
-        db.refresh(db_obj)
-        return db_obj
-
-    def delete(self, db: Session, *, id: int) -> ModelType:
-        obj = db.query(self.model).get(id)
-        db.delete(obj)
-        db.commit()
-        return obj