Removed imported symbols that are not accessed or re-exported (#4387)

Co-authored-by: Eric Traut <erictr@microsoft.com>

stdlib/3/tkinter/ttk.pyi

@@ -1,7 +1,7 @@
 import sys
 import tkinter
 from tkinter import Event
-from typing import Any, Callable, Dict, List, Optional, Tuple, Type, TypeVar, Union, overload
+from typing import Any, Callable, List, Optional, overload
 from typing_extensions import Literal
 
 def tclobjs_to_py(adict): ...