remove unused test form so fix validate test

spec/lib/tasks/form_definition_validator_spec.rb

@@ -11,7 +11,7 @@ describe "rake form_definition:validate_all", type: :task do
   end
 
   it "runs the validate task for each form definition in the project" do
-    expect(Rake::Task["form_definition:validate"]).to receive(:invoke).exactly(4).times
+    expect(Rake::Task["form_definition:validate"]).to receive(:invoke).exactly(3).times
     task.invoke
   end
 end