Git commits in Moodle 3.4.9 by Dan Marsden

commit 5a89ac9640b3a695720845b6ddeff65e69a289fc
Author: Dan Marsden <dan@danmarsden.com>
Date:   Wed, 01 May 2019 09:23:15 +0800
Tag:    v3.4.9

MDL-64708 cohort: Return url is not used anywhere in core.