Revert "[GH-5915] Clicking on @mention of a user in a post shows the profile popover (#6129)" (#6289)

This reverts commit 83f819451a.

webapp/components/add_users_to_team/add_users_to_team.jsx

@@ -2,7 +2,7 @@
 // See License.txt for license information.
 
 import MultiSelect from 'components/multiselect/multiselect.jsx';
-import ProfilePicture from 'components/profile_popover/picture_profile_popover.jsx';
+import ProfilePicture from 'components/profile_picture.jsx';
 
 import {addUsersToTeam} from 'actions/team_actions.jsx';
 import {searchUsersNotInTeam} from 'actions/user_actions.jsx';