Remove github_changelog_generator

We use github release notes now

Author: tvdeyen

Rakefile

@@ -5,11 +5,3 @@ rescue LoadError
 end
 
 require 'bundler/gem_tasks'
-
-require "github_changelog_generator/task"
-require "alchemy_i18n/version"
-GitHubChangelogGenerator::RakeTask.new(:changelog) do |config|
-  config.user = "AlchemyCMS"
-  config.project = "alchemy_i18n"
-  config.future_release = "v#{AlchemyI18n::VERSION}"
-end

alchemy_i18n.gemspec

@@ -28,6 +28,4 @@ Gem::Specification.new do |s|
 
   s.add_dependency "alchemy_cms", [">= 8.0.0.c", "< 9"]
   s.add_dependency "rails-i18n"
-
-  s.add_development_dependency "github_changelog_generator"
 end