Issue #27714: Remove unneeded non-idempotent call that fails on retest.

diff --cc Lib/idlelib/idle_test/test_autocomplete.py
index 97bfab5a569b28d32f88709d0f041de554c78332,5fc899dcd4e05bd70bb28e717f1872ce266e2cf6..f3f2dea4246df00a6fe4a47e099d9475de0bd0c3
--- 1/Lib/idlelib/idle_test/test_autocomplete.py
--- 2/Lib/idlelib/idle_test/test_autocomplete.py
+++ b/Lib/idlelib/idle_test/test_autocomplete.py
@@@ -6,9 -2,8 +6,8 @@@ import unittes
  from test.support import requires
  from tkinter import Tk, Text
  
 -import idlelib.AutoComplete as ac
 -import idlelib.AutoCompleteWindow as acw
 +import idlelib.autocomplete as ac
 +import idlelib.autocomplete_w as acw
- from idlelib import macosx
  from idlelib.idle_test.mock_idle import Func
  from idlelib.idle_test.mock_tk import Event