remove unused puppet testing dependency

All tests pass fine without it

Author: bastelfreak

puppet-blacksmith.gemspec

@@ -21,7 +21,6 @@ Gem::Specification.new do |s|
   s.add_dependency 'rest-client', '~>2.0'
   s.add_development_dependency 'aruba', '~> 2.1'
   s.add_development_dependency 'cucumber', '>= 9', '< 11'
-  s.add_development_dependency 'puppet', '>= 7.24', '< 9'
   s.add_development_dependency 'rake', '~> 13.0', '>= 13.0.6'
   s.add_development_dependency 'rspec', '~> 3.12'
   s.add_development_dependency 'voxpupuli-rubocop', '~> 3.1.0'