Gemfile in particlefx2d-0.3.0 vs Gemfile in particlefx2d-0.4.0

@@ -2,7 +2,5 @@
 
 source 'https://rubygems.org'
 
 # Specify your gem's dependencies in particlefx2d.gemspec
 gemspec
-
-gem 'ruby2d', '~> 0.11.3'