button_based_providers.any? instead of !button_based_providers.empty?

app/views/admin/application_settings/_form.html.haml

@@ -109,7 +109,7 @@
           = f.label :signin_enabled do
             = f.check_box :signin_enabled
             Sign-in enabled
-    - if omniauth_enabled? && !button_based_providers.empty?
+    - if omniauth_enabled? && button_based_providers.any?
       .form-group
         = f.label :enabled_oauth_sign_in_sources, 'Enabled OAuth Sign-In sources', class: 'control-label col-sm-2'
         .col-sm-10