While using resque-scheduler 2.0.1, you have to delete scheduled jobs by hand

remove_scheduled_resque_job.rb

def remove_scheduled_resque_job(&block)
  [].tap do |processed|
    $redis.scan_each(match: "resque:delayed:*") do |key|
      $redis.lrange(key, 0, -1).each do |value|
        begin
          payload = ActiveSupport::JSON.decode(value)
          if yield(payload)
            $redis.lrem(key, 1, value)
            processed << value
          end
        rescue => e
          raise e, "error processing key: #{key}"
        end
      end
    end
  end
end