Make mypy on Python 3.7 happy again (#1158)

Author: robsdedude

src/neo4j/_async/io/_bolt.py

@@ -59,8 +59,6 @@
 
 
 if t.TYPE_CHECKING:
-    import typing_extensions as te
-
     from ..._api import TelemetryAPI
 
 
@@ -263,7 +261,7 @@ def assert_notification_filtering_support(self):
 
     protocol_handlers: t.ClassVar[dict[Version, type[AsyncBolt]]] = {}
 
-    def __init_subclass__(cls: type[te.Self], **kwargs: t.Any) -> None:
+    def __init_subclass__(cls, **kwargs: t.Any) -> None:
         if cls.SKIP_REGISTRATION:
             super().__init_subclass__(**kwargs)
             return

src/neo4j/_sync/io/_bolt.py

@@ -37,9 +37,9 @@
         TickingDateTimeFactory,
     )
 
-    TFreezeTime: te.TypeAlias = (
-        StepTickTimeFactory | TickingDateTimeFactory | FrozenDateTimeFactory
-    )
+    TFreezeTime: te.TypeAlias = t.Union[
+        StepTickTimeFactory, TickingDateTimeFactory, FrozenDateTimeFactory
+    ]
 
 
 @pytest.fixture