Remove redundant btn-close classes

app/views/projects/runners/_group_runners.html.haml

@@ -13,7 +13,7 @@
     %br
     %br
     - if @project.group_runners_enabled?
-      = link_to toggle_group_runners_project_runners_path(@project), class: 'btn gl-button btn-warning-secondary btn-close', method: :post do
+      = link_to toggle_group_runners_project_runners_path(@project), class: 'btn gl-button btn-warning-secondary', method: :post do
         = _('Disable group runners')
     - else
       = link_to toggle_group_runners_project_runners_path(@project), class: 'btn gl-button btn-success btn-inverted', method: :post do

app/views/projects/runners/_shared_runners.html.haml

@@ -9,7 +9,7 @@
         = _('Shared runners disabled on group level')
     - else
       - if @project.shared_runners_enabled?
-        = link_to toggle_shared_runners_project_runners_path(@project), class: 'btn gl-button btn-warning-secondary btn-close', method: :post do
+        = link_to toggle_shared_runners_project_runners_path(@project), class: 'btn gl-button btn-warning-secondary', method: :post do
           = _('Disable shared runners')
       - else
         = link_to toggle_shared_runners_project_runners_path(@project), class: 'btn gl-button btn-success', method: :post do