Split public and private config/driver APIs (#6024)

redbot/core/config.py

@@ -35,7 +35,6 @@ log = logging.getLogger("red.config")
 _T = TypeVar("_T")
 
 _config_cache = weakref.WeakValueDictionary()
-_retrieved = weakref.WeakSet()
 
 
 class ConfigMeta(type):
@@ -65,14 +64,6 @@ class ConfigMeta(type):
         return instance
 
 
-def get_latest_confs() -> Tuple["Config"]:
-    global _retrieved
-    ret = set(_config_cache.values()) - set(_retrieved)
-    _retrieved |= ret
-    # noinspection PyTypeChecker
-    return tuple(ret)
-
-
 class _ValueCtxManager(Awaitable[_T], AsyncContextManager[_T]):  # pylint: disable=duplicate-bases
     """Context manager implementation of config values.
 
@@ -1529,16 +1520,6 @@ class Config(metaclass=ConfigMeta):
             return self._lock_cache.setdefault(id_data, asyncio.Lock())
 
 
-async def migrate(cur_driver_cls: Type[BaseDriver], new_driver_cls: Type[BaseDriver]) -> None:
-    """Migrate from one driver type to another."""
-    # Get custom group data
-    core_conf = Config.get_core_conf(allow_old=True)
-    core_conf.init_custom("CUSTOM_GROUPS", 2)
-    all_custom_group_data = await core_conf.custom("CUSTOM_GROUPS").all()
-
-    await cur_driver_cls.migrate_to(new_driver_cls, all_custom_group_data)
-
-
 def _str_key_dict(value: Dict[Any, _T]) -> Dict[str, _T]:
     """
     Recursively casts all keys in the given `dict` to `str`.