simplify TODO_2 in lesosn 4 by removing organizer display names
simplify TODO_2 in lesosn 4 by removing organizer display names

kerrmarin/fwd-conference,bschmoker/paxmidwest,codingvirtual/fullstack-p4-conference,swesterveld/udacity-nd004-p4-conference-organization-app,eldonuts/Udacity-FSND-P4-Conferences,davcs86/fullstack-nanodegree-conference-cloud-app,scottharman/Conference-Central,arizonatribe/app-engine-demo,kirklink/udacity-fullstack-p4,davcs86/fullstack-nanodegree-conference-cloud-app,kerrmarin/fwd-conference,eldonuts/Udacity-FSND-P4-Conferences,bschmoker/paxmidwest,eldonuts/Udacity-FSND-P4-Conferences,kirklink/udacity-fullstack-p4,kerrmarin/fwd-conference,codingvirtual/fullstack-p4-conference,kirklink/udacity-fullstack-p4,bschmoker/paxmidwest,davcs86/fullstack-nanodegree-conference-cloud-app,swesterveld/udacity-nd004-p4-conference-organization-app,arizonatribe/app-engine-demo,codingvirtual/fullstack-p4-conference,arizonatribe/app-engine-demo,scottharman/Conference-Central,scottharman/Conference-Central,swesterveld/udacity-nd004-p4-conference-organization-app