Git commits in Moodle 3.5.6 by Dan Marsden

commit cd6fb4322b6b1914c05f05033a71ed060f875fd4
Author: Dan Marsden <dan@danmarsden.com>
Date:   Wed, 01 May 2019 09:23:15 +0800
Tag:    v3.5.6

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