Remove journey since it was merged into Rails, and change deprecated rubygems source

Author: carlosantoniodasilva

Gemfile

@@ -1,7 +1,6 @@
-source :rubygems
+source 'https://rubygems.org'
 gemspec
 
 # Roll w/ master until 4.0 is cut
 gem 'actionpack', :github => 'rails/rails', branch: 'master'
-gem 'journey', :github => 'rails/journey', branch: 'master'
 gem 'railties', :github => 'rails/rails', branch: 'master'