tkinter: Require passing in a callback function to .after() (#11013)

stdlib/tkinter/__init__.pyi

@@ -347,9 +347,8 @@ class Misc:
     def tk_focusFollowsMouse(self) -> None: ...
     def tk_focusNext(self) -> Misc | None: ...
     def tk_focusPrev(self) -> Misc | None: ...
-    @overload
-    def after(self, ms: int, func: None = None) -> None: ...
-    @overload
+    # .after() can be called without the "func" argument, but it is basically never what you want.
+    # It behaves like time.sleep() and freezes the GUI app.
     def after(self, ms: int | Literal["idle"], func: Callable[..., object], *args: Any) -> str: ...
     # after_idle is essentially partialmethod(after, "idle")
     def after_idle(self, func: Callable[..., object], *args: Any) -> str: ...