Remove leftover jQuery code from test environment (#2905)

Fixes #2902

Author: ddbrendan

app/views/administrate/application/_javascript.html.erb

@@ -12,10 +12,3 @@ by providing a `content_for(:javascript)` block.
 <% end %>
 
 <%= yield :javascript %>
-
-<% if Rails.env.test? %>
-  <%= javascript_tag do %>
-    $.fx.off = true;
-    $.ajaxSetup({ async: false });
-  <% end %>
-<% end %>

spec/example_app/app/views/application/_javascript.html.erb

@@ -3,10 +3,3 @@
 <% end %>
 
 <%= yield :javascript %>
-
-<% if Rails.env.test? %>
-  <%= javascript_tag do %>
-    $.fx.off = true;
-    $.ajaxSetup({ async: false });
-  <% end %>
-<% end %>