bpo-40443: Remove unused imports in idlelib (GH-19801)

diff --git a/Lib/idlelib/config_key.py b/Lib/idlelib/config_key.py
index 4478323..7510aa9 100644
--- a/Lib/idlelib/config_key.py
+++ b/Lib/idlelib/config_key.py
@@ -1,7 +1,7 @@
 """
 Dialog for building Tkinter accelerator key bindings
 """
-from tkinter import Toplevel, Listbox, Text, StringVar, TclError
+from tkinter import Toplevel, Listbox, StringVar, TclError
 from tkinter.ttk import Frame, Button, Checkbutton, Entry, Label, Scrollbar
 from tkinter import messagebox
 import string