Correct regression to Pipfile entries.

Author: matteius

tests/integration/test_uninstall.py

@@ -130,7 +130,6 @@ def test_uninstall_all_dev(pipenv_instance_private_pypi):
 
         c = p.pipenv("uninstall --all-dev")
         assert c.returncode == 0
-        assert p.pipfile["dev-packages"] == {}
         assert "jinja2" not in p.lockfile["develop"]
         assert "six" not in p.lockfile["develop"]
         assert "tablib" in p.pipfile["packages"]