Rakefile in prawn-2.3.0 vs Rakefile in prawn-2.4.0

@@ -1,54 +1,25 @@
 # frozen_string_literal: true
 
-require 'rake'
-require 'rspec/core/rake_task'
-require 'yard'
-require 'rubygems/package_task'
-require 'rubocop/rake_task'
+GEMSPEC = File.expand_path('prawn.gemspec', __dir__)
+require 'prawn/dev/tasks'
 
 task default: %i[spec rubocop]
 
-desc 'Run all rspec files'
-RSpec::Core::RakeTask.new('spec') do |c|
-  c.rspec_opts = '-t ~unresolved'
-end
-
-YARD::Rake::YardocTask.new do |t|
-  t.options = ['--output-dir', 'doc/html']
-end
-task docs: :yard
-
 desc "Generate the 'Prawn by Example' manual"
 task :manual do
   puts 'Building manual...'
   require File.expand_path(File.join(__dir__, %w[manual contents]))
   prawn_manual_document.render_file('manual.pdf')
   puts 'The Prawn manual is available at manual.pdf. Happy Prawning!'
 end
 
-spec = Gem::Specification.load 'prawn.gemspec'
-Gem::PackageTask.new(spec) do |pkg|
-  pkg.need_zip = true
-  pkg.need_tar = true
-end
-
 desc 'Run a console with Prawn loaded'
 task :console do
   require 'irb'
   require 'irb/completion'
   require_relative 'lib/prawn'
   Prawn.debug = true
 
   ARGV.clear
   IRB.start
-end
-
-RuboCop::RakeTask.new
-
-task :checksum do
-  require 'digest/sha2'
-  built_gem_path = "prawn-#{Prawn::VERSION}.gem"
-  checksum = Digest::SHA512.new.hexdigest(File.read(built_gem_path))
-  checksum_path = "checksums/#{built_gem_path}.sha512"
-  File.write(checksum_path, checksum)
 end