Drop Rails < 3.2 support

Author: amatsuda

.travis.yml

@@ -8,8 +8,6 @@ rvm:
   - ruby-head
 
 gemfile:
-  - gemfiles/Gemfile.rails-3.0
-  - gemfiles/Gemfile.rails-3.1
   - gemfiles/Gemfile.rails-3.2
   - gemfiles/Gemfile.rails-4.0
   - gemfiles/Gemfile.rails-4.1
@@ -24,22 +22,10 @@ matrix:
       gemfile: gemfiles/Gemfile.rails-edge
     - rvm: 2.1
       gemfile: gemfiles/Gemfile.rails-edge
-    - rvm: 2.2.4
-      gemfile: gemfiles/Gemfile.rails-3.0
-    - rvm: 2.2.4
-      gemfile: gemfiles/Gemfile.rails-3.1
     - rvm: 2.2.4
       gemfile: gemfiles/Gemfile.rails-3.2
-    - rvm: 2.3.0
-      gemfile: gemfiles/Gemfile.rails-3.0
-    - rvm: 2.3.0
-      gemfile: gemfiles/Gemfile.rails-3.1
     - rvm: 2.3.0
       gemfile: gemfiles/Gemfile.rails-3.2
-    - rvm: ruby-head
-      gemfile: gemfiles/Gemfile.rails-3.0
-    - rvm: ruby-head
-      gemfile: gemfiles/Gemfile.rails-3.1
     - rvm: ruby-head
       gemfile: gemfiles/Gemfile.rails-3.2
   allow_failures:

README.md

@@ -169,7 +169,7 @@ end
 
 * Ruby 2.0, 2.1, 2.2, 2.3, 2.4 (trunk)
 
-* Rails 3.0.x, 3.1.x, 3.2.x, 4.0.x, 4.1, 4.2, 5.0 (edge)
+* Rails 3.2.x, 4.0.x, 4.1, 4.2, 5.0 (edge)
 
 * HTML5 compatible browsers
 

gemfiles/Gemfile.rails-3.0

@@ -16,9 +16,6 @@ class Railtie < ::Rails::Railtie #:nodoc:
       ActiveSupport.on_load(:active_record) do
         require 'html5_validators/active_model/helper_methods'
         require 'html5_validators/active_model/validations'
-        if (Rails.version < '3.1.0.beta2') && (Rails.version != '3.1.0')
-          require 'html5_validators/active_model/initializer_monkey_patches'
-        end
         require 'html5_validators/active_record/base'
       end
       ActiveSupport.on_load(:action_view) do