hold off on gcg

The version of github changelog generator we want to use requires a
version of Ruby we can't yet guarantee. This reverts all the plumbing
for gcg while still committing the changelog

Gemfile

@@ -5,7 +5,6 @@ gemspec
 gem 'rgen'
 gem 'redcarpet'
 gem 'yard', '~> 0.9.11'
-gem 'github_changelog_generator', git: 'https://github.com/skywinder/github-changelog-generator', ref: 'master'
 
 if ENV['PUPPET_GEM_VERSION']
   gem 'puppet', ENV['PUPPET_GEM_VERSION'], :require => false

Rakefile

@@ -1,7 +1,6 @@
 require 'rubygems'
 require 'puppetlabs_spec_helper/rake_tasks'
 require 'puppet-lint/tasks/puppet-lint'
-require 'github_changelog_generator/task'
 
 # Add our own tasks
 require 'puppet-strings/tasks'
@@ -9,32 +8,6 @@ require 'puppet-strings/tasks'
 PuppetLint.configuration.send('disable_80chars')
 PuppetLint.configuration.ignore_paths = %w(acceptance/**/*.pp spec/**/*.pp pkg/**/*.pp)
 
-GitHubChangelogGenerator::RakeTask.new :changelog do |config|
-  config.user = 'puppetlabs'
-  config.project = 'puppet-strings'
-  config.since_tag = '1.1.1'
-  config.future_release = '1.2.0'
-  config.exclude_labels = ['maintenance']
-  config.header = "# Change log\n\nAll notable changes to this project will be documented in this file. The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/) and this project adheres to [Semantic Versioning](http://semver.org)."
-  config.add_pr_wo_labels = true
-  config.issues = false
-  config.merge_prefix = "### UNCATEGORIZED PRS; GO LABEL THEM"
-  config.configure_sections = {
-    "Changed" => {
-      "prefix" => "### Changed",
-      "labels" => ["backwards-incompatible"],
-    },
-    "Added" => {
-      "prefix" => "### Added",
-      "labels" => ["feature", "enhancement"],
-    },
-    "Fixed" => {
-      "prefix" => "### Fixed",
-      "labels" => ["bugfix"],
-    },
-  }
-end
-
 desc 'Validate Ruby source files and ERB templates.'
 task :validate do
   Dir['spec/**/*.rb','lib/**/*.rb'].each do |ruby_file|