remove sqlite

stopped working on my mac, but not used anyway
updated to latest debugger and rubyx

spec/rails_helper.rb

@@ -22,10 +22,6 @@ require 'rspec/rails'
 #
 # Dir[Rails.root.join('spec/support/**/*.rb')].each { |f| require f }
 
-# Checks for pending migrations and applies them before tests are run.
-# If you are not using ActiveRecord, you can remove this line.
-ActiveRecord::Migration.maintain_test_schema!
-
 RSpec.configure do |config|
   # Remove this line if you're not using ActiveRecord or ActiveRecord fixtures
   config.fixture_path = "#{::Rails.root}/spec/fixtures"