remove old tests

test/controllers/management/carousel_controller_test.rb

-require 'test_helper'
-
-class Management::CarouselControllerTest < ActionController::TestCase
-  # test "the truth" do
-  #   assert true
-  # end
-end

test/controllers/management/welcome_controller_test.rb

-require 'test_helper'
-
-class Management::WelcomeControllerTest < ActionController::TestCase
-  tests Management::WelcomeController
-
-  test "should get index" do
-    get :index
-    assert_response :success
-  end
-
-end

test/controllers/welcome_controller_test.rb

-require 'test_helper'
-
-class WelcomeControllerTest < ActionController::TestCase
-  tests WelcomeController
-
-  test "should get index" do
-    get :index
-    assert_response :success
-  end
-
-end
\ No newline at end of file