change: modify TODO on disabled Pylint check (#943)

The check recommendations are only valid for packages that exclusively
support Python 3. The changes cannot be made in Python 2.
The TODO was updated to clarify this.

Author: knakad

.pylintrc

@@ -88,7 +88,7 @@ disable=
     import-error, # Since we run Pylint before any of our builds in tox, this will always fail
     protected-access, # TODO: Fix access
     abstract-method, # TODO: Fix abstract methods
-    useless-object-inheritance, # TODO: Remove unnecessary imports
+    useless-object-inheritance, # TODO: Enable this check and fix code once Python 2 is no longer supported.
     cyclic-import, # TODO: Resolve cyclic imports
     no-self-use, # TODO: Convert methods to functions where appropriate
     too-many-branches, # TODO: Simplify or ignore as appropriate