Simplify NEWS entry to prevent suspicious warnings. (#3339)

Misc/NEWS.d/3.6.0a2.rst

@@ -584,14 +584,7 @@ Update idlelib/README.txt with new file names and event handlers.
 .. nonce: j1N9br
 .. section: IDLE
 
-Remove obsolete code not used by IDLE.  Replacements: 1. help.txt, replaced
-by help.html, is out-of-date and should not be used. Its dedicated viewer
-has be replaced by the html viewer in help.py. 2. ``import idlever; I =
-idlever.IDLE_VERSION`` is the same as ``import sys; I =
-version[:version.index(' ')]`` 3. After ``ob =
-stackviewer.VariablesTreeItem(*args)``, ``ob.keys() ==
-list(ob.object.keys)``. 4. In macosc, runningAsOSXAPP == isAquaTk;
-idCarbonAquaTk == isCarbonTk
+Remove obsolete code not used by IDLE.
 
 ..