diff --git a/ChangeLog b/ChangeLog
index 4b3354c005..2d2f2f4383 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Tue Feb  6 20:29:44 2007  Kouhei Sutou  <kou@cozmixng.org>
+
+	* lib/rss/rss.rb, lib/rss/parser.rb: removed needless code for
+	backward compatibility.
+
 Tue Feb  6 18:43:17 2007  Shugo Maeda  <shugo@ruby-lang.org>
 
 	* lib/net/ftp.rb: moved fixes for EPIPE to the correct
diff --git a/lib/rss/parser.rb b/lib/rss/parser.rb
index e272978992..96be12f748 100644
--- a/lib/rss/parser.rb
+++ b/lib/rss/parser.rb
@@ -1,17 +1,5 @@
 require "forwardable"
-begin
-  require "open-uri"
-rescue LoadError
-  require "uri"
-end
-unless Kernel.methods.include?("URI")
-  module Kernel
-    def URI(uri_str) # :doc:
-      URI.parse(uri_str)
-    end
-    module_function :URI
-  end
-end
+require "open-uri"
 
 require "rss/rss"
 
diff --git a/lib/rss/rss.rb b/lib/rss/rss.rb
index f424f16171..77a8584884 100644
--- a/lib/rss/rss.rb
+++ b/lib/rss/rss.rb
@@ -30,35 +30,6 @@ class Time
   end
 end
 
-module Enumerable
-  unless instance_methods.include?("sort_by")
-    def sort_by
-      collect do |x|
-        [yield(x), x]
-      end.sort do |x, y|
-        x[0] <=> y[0]
-      end.collect! do |x|
-        x[1]
-      end
-    end
-  end
-end
-
-class Hash
-  unless instance_methods.include?("merge")
-    def merge(other)
-      dup.update(other)
-    end
-  end
-end
-
-module Kernel
-  unless methods.include?("funcall")
-    def funcall(*args, &block)
-      __send__(*args, &block)
-    end
-  end
-end
 
 require "English"
 require "rss/utils"