bpo-35202: Remove more unused imports in idlelib (GH-10573)

(cherry picked from commit 5a087d5401)

Co-authored-by: Srinivas Reddy Thatiparthy (శ్రీనివాస్  రెడ్డి తాటిపర్తి) <thatiparthysreenivas@gmail.com>

Lib/idlelib/idle_test/test_browser.py

@@ -11,7 +11,6 @@ import os.path
 import pyclbr
 from tkinter import Tk
 
-from idlelib import filelist
 from idlelib.tree import TreeNode
 
 

Lib/idlelib/idle_test/test_config_key.py

@@ -5,7 +5,7 @@ from test.support import requires
 import unittest
 from tkinter import Tk
 from idlelib.idle_test.mock_idle import Func
-from idlelib.idle_test.mock_tk import Var, Mbox_func
+from idlelib.idle_test.mock_tk import Mbox_func
 
 
 class ValidationTest(unittest.TestCase):

Lib/idlelib/idle_test/test_configdialog.py

@@ -8,7 +8,7 @@ requires('gui')
 import unittest
 from unittest import mock
 from idlelib.idle_test.mock_idle import Func
-from tkinter import Tk, Frame, StringVar, IntVar, BooleanVar, DISABLED, NORMAL
+from tkinter import Tk, StringVar, IntVar, BooleanVar, DISABLED, NORMAL
 from idlelib import config
 from idlelib.configdialog import idleConf, changes, tracers
 

Lib/idlelib/idle_test/test_zoomheight.py

@@ -4,7 +4,7 @@
 from idlelib import zoomheight
 import unittest
 from test.support import requires
-from tkinter import Tk, Text
+from tkinter import Tk
 from idlelib.editor import EditorWindow