Merge pull request #1411 from puppetlabs/CAT-2128

(CAT-2128) Remove `json_pure` dependency

Author: danadoherty639

pdk.gemspec

@@ -47,7 +47,6 @@ Gem::Specification.new do |spec|
   # Other deps
   spec.add_runtime_dependency 'deep_merge', '~> 1.2.2'
   spec.add_runtime_dependency 'diff-lcs', '>= 1.5.0'
-  spec.add_runtime_dependency 'json_pure', '~> 2.6.3'
   spec.add_runtime_dependency 'pathspec', '~> 1.1'
   spec.add_runtime_dependency 'puppet_forge', '~> 5.0'