The RSpec spies syntax is now available by default

.rspec

@@ -0,0 +1 @@
+--format documentation

libv8.gemspec

@@ -29,6 +29,5 @@ Gem::Specification.new do |s|
   s.add_development_dependency "rake"
   s.add_development_dependency "rake-compiler"
   s.add_development_dependency "rspec"
-  s.add_development_dependency "rspec-spies"
   s.add_development_dependency "rubysl", "~> 2.0" if RUBY_ENGINE == "rbx"
 end

spec/spec_helper.rb

@@ -1,6 +1,5 @@
 $:.unshift File.expand_path '../../ext/libv8', __FILE__
 $:.unshift File.expand_path '../../lib', __FILE__
 require 'rspec'
-require 'rspec-spies'
 require 'libv8'
 require File.expand_path '../support/compiler_helpers', __FILE__