Revert "db: Force use of TimeTrackingCursor to work around Django 4.2 bug."

This reverts commit f1925487e8.

Signed-off-by: Anders Kaseorg <anders@zulip.com>

zerver/lib/db.py

@@ -1,17 +1,5 @@
 import time
-from typing import (
-    Any,
-    Callable,
-    Dict,
-    Iterable,
-    List,
-    Mapping,
-    Optional,
-    Sequence,
-    TypeVar,
-    Union,
-    overload,
-)
+from typing import Any, Callable, Dict, Iterable, List, Mapping, Sequence, TypeVar, Union
 
 from psycopg2.extensions import connection, cursor
 from psycopg2.sql import Composable
@@ -60,41 +48,6 @@ class TimeTrackingConnection(connection):
         self.queries: List[Dict[str, str]] = []
         super().__init__(*args, **kwargs)
 
-    @overload
-    def cursor(
-        self,
-        name: Union[str, bytes, None] = ...,
-        *,
-        withhold: bool = ...,
-        scrollable: Optional[bool] = ...,
-    ) -> TimeTrackingCursor:
-        ...
-
-    @overload
-    def cursor(
-        self,
-        name: Union[str, bytes, None] = ...,
-        *,
-        cursor_factory: Callable[..., CursorT] = ...,
-        withhold: bool = ...,
-        scrollable: Optional[bool] = ...,
-    ) -> CursorT:
-        ...
-
-    @overload
-    def cursor(
-        self,
-        name: Union[str, bytes, None],
-        cursor_factory: Callable[..., CursorT] = ...,
-        withhold: bool = ...,
-        scrollable: Optional[bool] = ...,
-    ) -> CursorT:
-        ...
-
-    def cursor(self, *args: Any, **kwargs: Any) -> cursor:
-        kwargs["cursor_factory"] = TimeTrackingCursor
-        return super().cursor(*args, **kwargs)
-
 
 def reset_queries() -> None:
     from django.db import connections