Remove Mattermost support for versions < 4.9.3
-
Follow up of https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/19043#note_75038674.
-
GitLab should not support any version of Mattermost that is before 4.9.3.
Follow up of https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/19043#note_75038674.
GitLab should not support any version of Mattermost that is before 4.9.3.