Lock the ruby version

Gemfile

@@ -1,4 +1,5 @@
-source 'http://rubygems.org'
+source 'https://rubygems.org'
+ruby '2.2.2'
 
 gem 'rake'
 gem 'rack'

Gemfile.lock

@@ -1,5 +1,5 @@
 GEM
-  remote: http://rubygems.org/
+  remote: https://rubygems.org/
   specs:
     activesupport (4.2.4)
       i18n (~> 0.7)
@@ -161,7 +161,6 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  activesupport
   breakpoint (~> 2.5.0)
   builder (~> 3.2.2)
   middleman (~> 3.4.0)
@@ -179,3 +178,6 @@ DEPENDENCIES
   typogruby (~> 1.0.18)
   tzinfo-data (~> 1.2015.6)
   wdm (~> 0.1.0)
+
+BUNDLED WITH
+   1.10.6

Rakefile

@@ -45,7 +45,7 @@ task :middleman do
 end
 
 desc "Build the site."
-task :build => [:check_ruby_version, :import_sass, :middleman]
+task :build => [:import_sass, :middleman]
 
 task :check_ready_to_deploy do
   if `git config remote.heroku.url`.strip != "git@heroku.com:sass-lang.git"
@@ -55,12 +55,6 @@ task :check_ready_to_deploy do
   end
 end
 
-task :check_ruby_version do
-  if RUBY_VERSION[0].to_i < 2
-    fail "Ruby 2 is required"
-  end
-end
-
 task :upload do
   sh %{git branch -D built-for-heroku} rescue nil
   sh %{git checkout -b built-for-heroku}