Disable issue Prev/Next links (hotfix)

app/views/shared/issuable/_sidebar.html.haml

@@ -9,12 +9,12 @@
       %a.gutter-toggle.pull-right.js-sidebar-toggle{href: '#'}
         = sidebar_gutter_toggle_icon
       .issuable-nav.hide-collapsed.pull-right.btn-group{role: 'group', "aria-label" => '...'}
-        - if prev_issuable = prev_issuable_for(issuable)
+        - if false
           = link_to 'Prev', [@project.namespace.becomes(Namespace), @project, prev_issuable], class: 'btn btn-default prev-btn issuable-pager'
         - else
           %a.btn.btn-default.issuable-pager.disabled{href: '#'}
             Prev
-        - if next_issuable = next_issuable_for(issuable)
+        - if false
           = link_to 'Next', [@project.namespace.becomes(Namespace), @project, next_issuable], class: 'btn btn-default next-btn issuable-pager'
         - else
           %a.btn.btn-default.issuable-pager.disabled{href: '#'}