Fix extra newline haml_lint violation

ee/app/views/shared/promotions/_promote_mr_features.html.haml

@@ -15,6 +15,5 @@
               = link_to 'Merge Request Approvals', help_page_path('user/project/merge_requests/merge_request_approvals.html'), target: '_blank'
               %p
                 Merge request approvals allow you to set the number of necessary approvals and predefine a list of approvers that will need to approve every merge request in a project.
-            
 
         = render 'shared/promotions/promotion_link_project'