Removed Ragel Ruby patches

These are included in Ragel 6.9.

task/lexer.rake

@@ -1,19 +1,5 @@
 rule '.rb' => '.rl' do |task|
   sh "ragel -F1 -R #{task.source} -o #{task.name}"
-
-  puts "Applying patch http://git.io/ow6e1A to #{task.name}"
-
-  # Patches the lexer based on http://git.io/ow6e1A.
-  input  = File.read(task.source)
-  output = File.read(task.name)
-  getkey = input.match(/getkey\s+(.+);/)[1]
-
-  output = output.gsub(getkey, '_wide')
-  output = output.gsub('_trans = if', "_wide = #{getkey}\n  _trans = if")
-
-  File.open(task.name, 'w') do |handle|
-    handle.write(output)
-  end
 end
 
 rule '.c' => ['.rl', 'ext/ragel/base_lexer.rl'] do |task|