Remove rails extension

lib/periodicity/extensions/active_job.rb

@@ -1,9 +0,0 @@
-module Periodicity
-  module Extensions
-    module ActiveJob
-      def perform_every(period, *args)
-        Config.instance.schedule += [self, Period.new(period, *args)]
-      end
-    end
-  end
-end

lib/periodicity/rails.rb

@@ -1,13 +0,0 @@
-module Periodicity
-  def self.hook_rails!
-    ActiveSupport.on_load(:active_job) do
-      extend Periodicity::Extensions::ActiveJob
-    end
-  end
-
-  class Rails < ::Rails::Engine
-    initializer 'periodicity' do
-      Periodicity.hook_rails!
-    end
-  end
-end