Remove rdoc task from generated plugin Rakefile

railties/lib/generators/rails/plugin/templates/Rakefile.tt

 require 'rake'
 require 'rake/testtask'
-require 'rake/rdoctask'
 
 desc 'Default: run unit tests.'
 task :default => :test
@@ -11,12 +10,3 @@ Rake::TestTask.new(:test) do |t|
   t.libs << 'test'
   t.pattern = 'test/**/*_test.rb'
 end
-
-desc 'Generate documentation for the <%= file_name %> plugin.'
-Rake::RDocTask.new(:rdoc) do |rdoc|
-  rdoc.rdoc_dir = 'rdoc'
-  rdoc.title    = '<%= class_name %>'
-  rdoc.options << '--line-numbers' << '--inline-source'
-  rdoc.rdoc_files.include('README')
-  rdoc.rdoc_files.include('lib/**/*.rb')
-end