enum34 is causing problems in python3.8 tests of edx-platform because it has incompatibility with recent versions of python, the error the error happens while importing the re module in these python versions.

This library is a backport of enum of python3.4 made for python<3.4, therefore is not needed anymore.

edx-val was updated to remove that dependency: https://github.com/edx/edx-val/pull/245