Skip puppet2 tests

In 8d48431 a selection mechanism was
added and in c9fec19 the syntax was
changed. However, it doesn't appear to work anymore and now no tests are
executed. This statically skips the only test that can't be executed on
Puppet < 4. We don't test that anyway so nothing is lost.

Rakefile

@@ -10,10 +10,7 @@ CLOBBER.include('Gemfile.lock')
 
 RSpec::Core::RakeTask.new
 Cucumber::Rake::Task.new(:features) do |t|
-  require 'puppet'
-  puppet_version = Puppet::version.gsub("~>","").split(".").first.to_i
-  tags = (2..5).select {|i| i != puppet_version}.map{|i| "--tags '@puppet#{puppet_version} and not @puppet#{i}'"}
-  t.cucumber_opts = tags.join(" ")
+  t.cucumber_opts = ['--tags "not @puppet2"']
 end
 
 Rake::TestTask.new do |test|