[V3] Use typing.TYPE_CHECKING instead of utils.TYPE_CHECKING (#1778)

Not needed any more as we no longer support python<3.6

redbot/core/config.py

@@ -1,15 +1,13 @@
 import logging
 import collections
 from copy import deepcopy
-from typing import Union, Tuple
+from typing import Union, Tuple, TYPE_CHECKING
 
 import discord
 
 from .data_manager import cog_data_path, core_data_path
 from .drivers import get_driver
 
-from .utils import TYPE_CHECKING
-
 if TYPE_CHECKING:
     from .drivers.red_base import BaseDriver