Remove github_changelog_generator

We use github release notes for changelog now

Author: tvdeyen

.github/dependabot.yml

@@ -10,7 +10,6 @@ updates:
         dependency-type: "development"
         patterns:
           - "factory_bot"
-          - "github_changelog_generator"
           - "jsonapi-rspec"
           - "rspec-rails"
           - "shoulda-matchers"

CHANGELOG.md

@@ -474,7 +474,3 @@
 - Add Rufo and Rubocop [\#3](https://github.com/AlchemyCMS/alchemy-json_api/pull/3) ([mamhoff](https://github.com/mamhoff))
 - Add Layout Pages Controller [\#2](https://github.com/AlchemyCMS/alchemy-json_api/pull/2) ([mamhoff](https://github.com/mamhoff))
 - Add Language Serializer [\#1](https://github.com/AlchemyCMS/alchemy-json_api/pull/1) ([mamhoff](https://github.com/mamhoff))
-
-
-
-\* *This Changelog was automatically generated by [github_changelog_generator](https://github.com/github-changelog-generator/github-changelog-generator)*

Rakefile

@@ -30,11 +30,3 @@ task :test_setup do
     exit($?.exitstatus) unless $?.success?
   end
 end
-
-require "github_changelog_generator/task"
-require "alchemy/json_api/version"
-GitHubChangelogGenerator::RakeTask.new(:changelog) do |config|
-  config.user = "AlchemyCMS"
-  config.project = "alchemy-json_api"
-  config.future_release = "v#{Alchemy::JsonApi::VERSION}"
-end

alchemy-json_api.gemspec

@@ -22,7 +22,6 @@ Gem::Specification.new do |spec|
   spec.add_dependency "jsonapi.rb", [">= 1.6.0", "< 2.2"]
 
   spec.add_development_dependency "factory_bot"
-  spec.add_development_dependency "github_changelog_generator"
   spec.add_development_dependency "jsonapi-rspec"
   spec.add_development_dependency "rspec-rails"
   spec.add_development_dependency "shoulda-matchers"