Gemfile in rouge-3.30.0 vs Gemfile in rouge-4.0.0

@@ -8,21 +8,18 @@
 
 gem 'minitest', '>= 5.0'
 gem 'minitest-power_assert'
 gem 'power_assert', '~> 1.2'
 
-gem 'parallel', '~> 1.13.0' if RUBY_VERSION < '2.2.0'
 gem 'rubocop', '~> 1.0', '<= 1.11'
 gem 'rubocop-performance'
 
 # don't try to install redcarpet under jruby
-gem 'redcarpet', :platforms => :ruby
+gem 'redcarpet', platforms: :ruby
 
 # Profiling
-if RUBY_VERSION >= '2.3.0'
-  gem 'memory_profiler', :require => false
-end
+gem 'memory_profiler', require: false
 
 # Needed for a Rake task
 gem 'git'
 gem 'yard'
 
@@ -31,14 +28,10 @@
 
   # docs
   gem 'github-markup'
 
   # for visual tests
-  if RUBY_VERSION < '2.2.0'
-    gem 'sinatra', '~> 1.4.8'
-  else
-    gem 'sinatra'
-  end
+  gem 'sinatra'
 
   # Ruby 3 no longer ships with a web server
   gem 'puma' if RUBY_VERSION >= '3'
   gem 'shotgun'
 end