Remove rdoc tasks from Rakefile

Rakefile

@@ -4,20 +4,5 @@ begin
 rescue LoadError
   puts 'You must `gem install bundler` and `bundle install` to run rake tasks'
 end
-begin
-  require 'rdoc/task'
-rescue LoadError
-  require 'rdoc/rdoc'
-  require 'rake/rdoctask'
-  RDoc::Task = Rake::RDocTask
-end
-
-RDoc::Task.new(:rdoc) do |rdoc|
-  rdoc.rdoc_dir = 'rdoc'
-  rdoc.title    = 'Capistrano Confirm Branch'
-  rdoc.options << '--line-numbers'
-  rdoc.rdoc_files.include('README.md')
-  rdoc.rdoc_files.include('lib/**/*.rb')
-end
 
-Bundler::GemHelper.install_tasks
+Bundler::GemHelper.install_tasks