Remove cucumber and unused files

lib/tasks/cucumber.rake

@@ -1,16 +0,0 @@
-$LOAD_PATH.unshift(Rails.root.to_s + '/vendor/plugins/cucumber/lib') if File.directory?(Rails.root.to_s + '/vendor/plugins/cucumber/lib')
-
-begin
-  require 'cucumber/rake/task'
-
-  Cucumber::Rake::Task.new(:features) do |t|
-    t.fork = true
-    t.cucumber_opts = ['--format', (ENV['CUCUMBER_FORMAT'] || 'pretty')]
-  end
-  task :features => 'db:test:prepare'
-rescue LoadError
-  desc 'Cucumber rake task not available'
-  task :features do
-    abort 'Cucumber rake task is not available. Be sure to install cucumber as a gem or plugin'
-  end
-end