Delete class selector that removes right padding

Delete mirror-action-buttons class that removes right padding
from repository mirror action buttons

app/assets/stylesheets/pages/settings.scss

@@ -316,8 +316,4 @@
 .push-pull-table {
   margin-top: 1em;
-
-  .mirror-action-buttons {
-    padding-right: 0;
-  }
 }

app/views/projects/mirrors/_mirror_repos.html.haml

@@ -57,7 +57,7 @@
                   %td
                     - if mirror.last_error.present?
                       .badge.mirror-error-badge{ data: { toggle: 'tooltip', html: 'true' }, title: html_escape(mirror.last_error.try(:strip)) }= _('Error')
-                  %td.mirror-action-buttons
+                  %td
                     .btn-group.mirror-actions-group.pull-right{ role: 'group' }
                       - if mirror.ssh_key_auth?
                         = clipboard_button(text: mirror.ssh_public_key, class: 'btn btn-default', title: _('Copy SSH public key'))