Remove double new issue button on group issue dashboard empty state

app/views/shared/empty_states/_issues.html.haml

@@ -16,6 +16,7 @@
           Also, issues are searchable and filterable.
         - if project_select_button
           = render 'shared/new_project_item_select', path: 'issues/new', label: 'New issue'
+        - else
           = link_to 'New issue', button_path, class: 'btn btn-new', title: 'New issue', id: 'new_issue_link'
       - else
         .text-center