Remove byebug from Gemfiles.

Gemfile

@@ -9,8 +9,6 @@ group :development, :test do
   gem 'rails'
   gem 'test-unit' # needed for Ruby >=2.2.0
 
-  gem 'byebug', platforms: :mri
-
   platforms :jruby do
     gem 'jruby-openssl'
     gem 'jgeoip'

gemfiles/Gemfile.rails3.2

@@ -9,8 +9,6 @@ group :development, :test do
   gem 'rails', '>= 3.2'
   gem 'test-unit' # needed for Ruby >=2.2.0
 
-  gem 'byebug', '9.0.6', platforms: :mri
-
   platforms :jruby do
     gem 'jruby-openssl'
     gem 'jgeoip'

gemfiles/Gemfile.rails4.1

@@ -9,8 +9,6 @@ group :development, :test do
   gem 'rails', '~> 4.1.13'
   gem 'test-unit' # needed for Ruby >=2.2.0
 
-  gem 'byebug', '9.0.6', platforms: :mri
-
   platforms :jruby do
     gem 'jruby-openssl'
     gem 'jgeoip'

gemfiles/Gemfile.rails5.0

@@ -9,8 +9,6 @@ group :development, :test do
   gem 'rails', '~> 5.0.1'
   gem 'test-unit' # needed for Ruby >=2.2.0
 
-  gem 'byebug', platforms: :mri
-
   platforms :jruby do
     gem 'jruby-openssl'
     gem 'jgeoip'