don't use moonrope from repo

Gemfile

@@ -29,7 +29,7 @@ gem 'nio4r'
 gem 'mongo'
 gem 'sentry-raven'
 gem 'gelf'
-gem 'moonrope', :git => 'https://github.com/adamcooke/moonrope', :branch => 'master'
+gem 'moonrope'
 gem 'jwt'
 gem 'createsend', '~> 4.0'
 gem 'acme-client'