Removes EE differences for app/views/groups/settings/_general.html.haml

Filipa Lacerdarequested to merge
12537-settings-general into master

Removes EE differences for app/views/groups/settings/_general.html.haml

Screenshot_2019-07-02_at_11.16.23

Closes https://gitlab.com/gitlab-org/gitlab-ee/issues/12537

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