remove puts

app/controllers/seminars_controller.rb

@@ -289,7 +289,6 @@ class SeminarsController < ApplicationController
       seminar_signup = {}
     end
     con = SeminarSignupContribute.find(params[:con_no])
-    puts ['con',con.inspect]
     {
       'con' => con,
       'seminar' => seminar,