[3.12] gh-120417: Remove unused import in idlelib (GH-120420) (#120574)

(cherry picked from commit 4c6d4f5)

Co-authored-by: Victor Stinner vstinner@python.org

Author: terryjreedy

Lib/idlelib/grep.py

@@ -190,7 +190,7 @@ def grep_it(self, prog, path):
 
 
 def _grep_dialog(parent):  # htest #
-    from tkinter import Toplevel, Text, SEL, END
+    from tkinter import Toplevel, Text, SEL
     from tkinter.ttk import Frame, Button
     from idlelib.pyshell import PyShellFileList