Lint Generator: Remove generated test/spec files

Follow-up to #1148

I noticed these tests did not fail even if `bin/rails standard` raised a
linting violation. Because the upcoming `suspenders:ci` generator will
run our linting tasks in CI, I felt having a test to do the same was no
longer warranted.

lib/generators/suspenders/lint_generator.rb

@@ -42,12 +42,6 @@ def configure_erb_lint
         copy_file "config_initializers_better_html.rb", "config/initializers/better_html.rb"
         copy_file "erblint.rake", "lib/tasks/erblint.rake"
         template "rubocop.yml.tt", ".rubocop.yml"
-
-        if default_test_suite?
-          copy_file "better_html_test.rb", "test/views/better_html_test.rb"
-        elsif rspec_test_suite?
-          copy_file "better_html_spec.rb", "spec/views/better_html_spec.rb"
-        end
       end
 
       def update_package_json

test/generators/suspenders/lint_generator_test.rb

@@ -220,24 +220,6 @@ class LintGeneratorTest < Rails::Generators::TestCase
         end
       end
 
-      test "generates erb-lint tests" do
-        with_test_suite :minitest do
-          capture(:stderr) { run_generator }
-
-          assert_file app_root("test/views/better_html_test.rb")
-          assert_no_file app_root("spec/views/better_html_spec.rb")
-        end
-      end
-
-      test "generates erb-lint specs" do
-        with_test_suite :rspec do
-          capture(:stderr) { run_generator }
-
-          assert_file app_root("spec/views/better_html_spec.rb")
-          assert_no_file app_root("test/views/better_html_test.rb")
-        end
-      end
-
       test "generates .rubocop.yml" do
         expected_content = <<~YAML
           AllCops: