cancelerizer.rb

module Cancelerizer
  def cancel arg
    Sidekiq::ScheduledSet.new.each do |job|
      (klass, method, args) = YAML.load job.args.first
      if self == klass and args.first == arg
        job.delete
      end
    end
  end
end

some_worker.rb

class SomeWorker
  include Sidekiq::Worker
  extend Cancelerizer
  
  def self.delayed_something path
    cancel path
    delay_for( 2.minutes ).process path
  end
  
  def self.process path
    puts "Processing #{path}"
  end
end