Remove parts of tkinter from pyright exclude (#8958)

stdlib/tkinter/dialog.pyi

@@ -12,5 +12,5 @@ DIALOG_ICON: str
 class Dialog(Widget):
     widgetName: str
     num: int
-    def __init__(self, master: Incomplete | None = ..., cnf: Mapping[str, Any] = ..., **kw) -> None: ...
+    def __init__(self, master: Incomplete | None = ..., cnf: Mapping[str, Any] = ..., **kw: Incomplete) -> None: ...
     def destroy(self) -> None: ...