Remove direct baked-in support for Textile.

Gemfile

@@ -7,7 +7,6 @@ gem 'redgreen', '~> 1.2'
 gem 'shoulda', '~> 3.5'
 gem 'rr', '~> 1.1'
 gem 'cucumber', '1.3.18'
-gem 'RedCloth', '~> 4.2'
 gem 'maruku', '~> 0.7.0'
 gem 'rdiscount', '~> 2.0'
 gem 'launchy', '~> 2.3'

lib/jekyll/converters/textile.rb

@@ -1,56 +0,0 @@
-module Jekyll
-  module Converters
-    class Textile < Converter
-      safe true
-
-      highlighter_prefix '<notextile>'
-      highlighter_suffix '</notextile>'
-
-      def setup
-        return if @setup
-        require 'redcloth'
-        @setup = true
-      rescue LoadError
-        STDERR.puts 'You are missing a library required for Textile. Please run:'
-        STDERR.puts '  $ [sudo] gem install RedCloth'
-        raise Errors::FatalException.new("Missing dependency: RedCloth")
-      end
-
-      def extname_matches_regexp
-        @extname_matches_regexp ||= Regexp.new(
-          '(' + @config['textile_ext'].gsub(',','|') +')$',
-          Regexp::IGNORECASE
-        )
-      end
-
-      def matches(ext)
-        ext =~ extname_matches_regexp
-      end
-
-      def output_ext(ext)
-        ".html"
-      end
-
-      def convert(content)
-        setup
-
-        # Shortcut if config doesn't contain RedCloth section
-        return RedCloth.new(content).to_html if @config['redcloth'].nil?
-
-        # List of attributes defined on RedCloth
-        # (from https://github.com/jgarber/redcloth/blob/master/lib/redcloth/textile_doc.rb)
-        attrs = ['filter_classes', 'filter_html', 'filter_ids', 'filter_styles',
-                'hard_breaks', 'lite_mode', 'no_span_caps', 'sanitize_html']
-
-        r = RedCloth.new(content)
-
-        # Set attributes in r if they are NOT nil in the config
-        attrs.each do |attr|
-          r.instance_variable_set("@#{attr}".to_sym, @config['redcloth'][attr]) unless @config['redcloth'][attr].nil?
-        end
-
-        r.to_html
-      end
-    end
-  end
-end