PYTHON-1316 Database.eval has no migration path on 4.2+

Author: ShaneHarvey

doc/migrate-to-pymongo4.rst

@@ -50,27 +50,23 @@ Warnings can also be changed to errors::
 .. note:: Not all deprecated features raise :exc:`DeprecationWarning` when
   used. See `Removed features with no migration path`_.
 
-Database
---------
+Removed features with no migration path
+---------------------------------------
 
-The "eval" method and SystemJS class are removed
-................................................
+Database.eval, Database.system_js, and SystemJS are removed
+...........................................................
 
 Removed :meth:`~pymongo.database.Database.eval`,
 :data:`~pymongo.database.Database.system_js` and
 :class:`~pymongo.database.SystemJS`. The eval command was deprecated in
-MongoDB 3.0 and removed in MongoDB 4.2.
+MongoDB 3.0 and removed in MongoDB 4.2. There is no replacement for eval with
+MongoDB 4.2+.
 
-Code like this::
+However, on MongoDB <= 4.0, code like this::
 
   >>> result = database.eval('function (x) {return x;}', 3)
 
-can be changed to this with MongoDB <= 4.0::
+can be changed to this::
 
   >>> from bson.code import Code
   >>> result = database.command('eval', Code('function (x) {return x;}'), args=[3]).get('retval')
-
-There is no replacement for eval with MongoDB 4.2+.
-
-Removed features with no migration path
----------------------------------------