dev: remove concourse pipelines and dev dependency

Author: flavorjones

.gitignore

@@ -4,4 +4,3 @@ pkg
 tmp
 Gemfile.lock
 .bundle
-concourse/private.yml

README.md

@@ -6,8 +6,7 @@
 
 ## Status
 
-[![Concourse CI](https://ci.nokogiri.org/api/v1/teams/nokogiri-core/pipelines/loofah/jobs/ruby-3.0/badge)](https://ci.nokogiri.org/teams/nokogiri-core/pipelines/loofah)
-[![Code Climate](https://codeclimate.com/github/flavorjones/loofah.svg)](https://codeclimate.com/github/flavorjones/loofah)
+[![ci](https://github.com/flavorjones/loofah/actions/workflows/ci.yml/badge.svg?branch=main)](https://github.com/flavorjones/loofah/actions/workflows/ci.yml)
 [![Tidelift dependencies](https://tidelift.com/badges/package/rubygems/loofah)](https://tidelift.com/subscription/pkg/rubygems-loofah?utm_source=rubygems-loofah&utm_medium=referral&utm_campaign=readme)
 
 

Rakefile

@@ -1,12 +1,6 @@
 require "hoe/markdown"
 Hoe::Markdown::Standalone.new("loofah").define_markdown_tasks
 
-require "concourse"
-Concourse.new("loofah", fly_target: "ci") do |c|
-  c.add_pipeline "loofah", "loofah.yml"
-  c.add_pipeline "loofah-pr", "loofah-pr.yml"
-end
-
 require "rake/testtask"
 Rake::TestTask.new do |t|
   t.libs << "test"