stop duplicate minitest runs

test/test_helper.rb

@@ -12,7 +12,6 @@ end
 
 require File.expand_path('../../config/environment', __FILE__)
 require 'rails/test_help'
-require "minitest/autorun"
 require 'minitest/reporters'
 require 'policy_assertions'
 Dir[Rails.root.join("test/test_helpers/**/*.rb")].each { |f| require f }