Use Rails 4.1 JSON parsing

activesupport-json_encoder is no longer compatible with Rails 5. This
switches back to Rails' default JSON parsing facilities, which may choke
on more edge cases. See 4.7.2 of

http://guides.rubyonrails.org/upgrading_ruby_on_rails.html

Author: dariusf

Gemfile

@@ -56,9 +56,6 @@ gem 'git_diff_parser'
 # Boolean expression grammar parsing
 gem 'citrus'
 
-# Use this to_json method to avoid encoding errors
-# gem 'activesupport-json_encoder'
-
 gem 'sinatra', '>= 2.0.0.beta2', require: nil
 
 group :development, :test do

app/workers/commit_auditor.rb

@@ -15,7 +15,6 @@
 =end
 
 require 'git_diff_parser'
-require 'activesupport/json_encoder'
 
 require_relative "#{Rails.root}/lib/audit_results_builder"
 require_relative "#{Rails.root}/lib/github_api"