Remove test for ActiveModel::Errors#generate_message

spec/unit/shoulda/matchers/active_model/helpers_spec.rb

@@ -78,16 +78,6 @@
         end
       end
     end
-
-    context 'if ActiveModel::Errors#generate_message behavior has changed' do
-      it 'provides the right error message for validate_presence_of' do
-        stub_active_model_message_generation(
-          type: :blank,
-          message: 'Behavior has diverged.',
-        )
-        assert_presence_validation_has_correct_message
-      end
-    end
   end
 
   def assert_presence_validation_has_correct_message
@@ -150,16 +140,4 @@ def store_translations(options = { without: [] }) # rubocop:disable Metrics/Meth
 
     I18n.backend.store_translations(:en, translations)
   end
-
-  def stub_active_model_message_generation(options = {})
-    attribute = options.delete(:attribute) || :attr
-    message = options.delete(:message)
-    type = options.delete(:type)
-
-    expect_any_instance_of(ActiveModel::Errors).
-      to receive(:generate_message).
-      with(attribute, type, {}).
-      at_least(1).
-      and_return(message)
-  end
 end