Revert "Merge branch 'multiple-assignee-docs' into 'master'"

This reverts merge request !1940

doc/user/project/issues/issues_functionalities.md

@@ -38,11 +38,6 @@ it's reassigned to someone else to take it from there.
 if a user is not member of that project, it can only be
 assigned to them if they created the issue themselves.
 
-In [GitLab Enterprise Edition Starter and up](https://about.gitlab.com/gitlab-ee/), 
-you can assign multiple people to an issue.
-The interface is exactly the same, except that you can select multiple users in the dropdown.
-The multiple assignees are also visible in issue lists and issue boards, and all get the same notifications.
-
 #### 4. Milestone
 
 - Select a [milestone](../milestones/index.md) to attribute that issue to.