Gemfile in riddle-2.2.0 vs Gemfile in riddle-2.2.1

@@ -1,16 +1,8 @@
+# frozen_string_literal: true
+
 source 'http://rubygems.org'
 
 gemspec
 
 gem 'mysql2',     '0.3.20', :platform => :ruby
 gem 'jdbc-mysql', '5.1.35', :platform => :jruby
-
-%w[
-  rspec
-  rspec-core
-  rspec-expectations
-  rspec-mocks
-  rspec-support
-].each do |library|
-  gem library, :git => "https://github.com/rspec/#{library}.git"
-end