Remove duplicate rake task and enable metadata.json linting

The :validate task is already provided by
puppetlabs_spec_helper/rake_tasks and would check files twice.

The metadata.json linting is just good form.

1 files changed, 1 insertions, 0 deletions

diff --git a/Gemfile b/Gemfile
index 82a5204..9d38f35 100644
--- a/Gemfile
+++ b/Gemfile
@@ -17,6 +17,7 @@ group :development, :unit_tests do
   gem 'mocha',                   :require => false
   gem 'puppetlabs_spec_helper',  :require => false
   gem 'puppet-lint',             :require => false
+  gem 'metadata-json-lint',      :require => false
   gem 'pry',                     :require => false
   gem 'simplecov',               :require => false
 end