Replace Equalizer with Virtus::Equalizer

lib/virtus.rb

@@ -260,7 +260,6 @@ def self.warn(msg)
 end # module Virtus
 
 require 'descendants_tracker'
-require 'equalizer'
 require 'axiom-types'
 require 'coercible'
 

lib/virtus/extensions.rb

@@ -71,7 +71,7 @@ def attribute(name, type = nil, options = {})
       def values(&block)
         private :attributes= if instance_methods.include?(:attributes=)
         yield
-        include(::Equalizer.new(*attribute_set.map(&:name)))
+        include(Equalizer.new(name, attribute_set.map(&:name)))
       end
 
       # The list of writer methods that can be mass-assigned to in #attributes=

virtus.gemspec

@@ -18,7 +18,6 @@ Gem::Specification.new do |gem|
   gem.extra_rdoc_files = %w[LICENSE README.md TODO.md]
 
   gem.add_dependency('descendants_tracker', '~> 0.0', '>= 0.0.3')
-  gem.add_dependency('equalizer', '~> 0.0', '>= 0.0.9')
   gem.add_dependency('coercible', '~> 1.0')
   gem.add_dependency('axiom-types', '~> 0.1')