Remove capybara-screenshot, which appears to have been slowing down the build dramatically

Gemfile

@@ -69,7 +69,6 @@ group :test, :development do
   gem 'shoulda-matchers'
   gem 'factory_girl_rails', :require => false
   gem 'capybara'
-  gem 'capybara-screenshot'
   gem 'database_cleaner', '0.7.1', :require => false
   gem 'simplecov', :require => false
   gem 'awesome_print'

Gemfile.lock

@@ -167,9 +167,6 @@ GEM
       rack (>= 1.0.0)
       rack-test (>= 0.5.4)
       xpath (~> 2.0)
-    capybara-screenshot (0.3.19)
-      capybara (>= 1.0, < 3)
-      launchy
     celluloid (0.15.2)
       timers (~> 1.1.0)
     chunky_png (1.3.0)
@@ -492,7 +489,6 @@ DEPENDENCIES
   aws-sdk
   bugsnag
   capybara
-  capybara-screenshot
   coffee-rails (~> 3.2.1)
   comfortable_mexican_sofa
   compass-rails

spec/spec_helper.rb

@@ -11,7 +11,6 @@ ENV["RAILS_ENV"] ||= 'test'
 require File.expand_path("../../config/environment", __FILE__)
 require 'rspec/rails'
 require 'capybara'
-require 'capybara-screenshot/rspec'
 require 'database_cleaner'
 
 # Allow connections to phantomjs/selenium whilst raising errors