Gemfile in pageflow-chart-1.2.0 vs Gemfile in pageflow-chart-2.0.0

@@ -1,6 +1,4 @@
 source 'https://rubygems.org'
 
 # Specify your gem's dependencies in chart.gemspec
 gemspec
-
-gem 'state_machine', git: 'https://github.com/codevise/state_machine.git'