fix(backend): Resolve Pydantic warning about missing secrets_dir (#8692)

- Remove `secrets_dir` and other references to `get_secrets_path()`
- Remove unused `get_config_path()`

Follow-up to #8521, which removed the `secrets` dir but not the references to it.

autogpt_platform/backend/backend/util/data.py

@@ -3,14 +3,6 @@ import pathlib
 import sys
 
 
-def get_secrets_path() -> pathlib.Path:
-    return get_data_path() / "secrets"
-
-
-def get_config_path() -> pathlib.Path:
-    return get_data_path()
-
-
 def get_frontend_path() -> pathlib.Path:
     if getattr(sys, "frozen", False):
         # The application is frozen

autogpt_platform/backend/backend/util/settings.py

@@ -11,7 +11,7 @@ from pydantic_settings import (
     SettingsConfigDict,
 )
 
-from backend.util.data import get_data_path, get_secrets_path
+from backend.util.data import get_data_path
 
 T = TypeVar("T", bound=BaseSettings)
 
@@ -272,7 +272,6 @@ class Secrets(UpdateTrackingModel["Secrets"], BaseSettings):
     # Add more secret fields as needed
 
     model_config = SettingsConfigDict(
-        secrets_dir=get_secrets_path(),
         env_file=".env",
         env_file_encoding="utf-8",
         extra="allow",
@@ -299,11 +298,3 @@ class Settings(BaseModel):
                 with open(config_path, "w") as f:
                     json.dump(config_to_save, f, indent=2)
             self.config.clear_updates()
-
-        # Save updated secrets to individual files
-        secrets_dir = get_secrets_path()
-        for key in self.secrets.updated_fields:
-            secret_file = os.path.join(secrets_dir, key)
-            with open(secret_file, "w") as f:
-                f.write(str(getattr(self.secrets, key)))
-        self.secrets.clear_updates()