track raw displayname on user objects

lib/models/room-member.js

@@ -212,21 +212,6 @@ function calculateDisplayName(member, event, roomState) {
     var displayName = event.getDirectionalContent().displayname;
     var selfUserId = member.userId;
 
-    /*
-    // FIXME: this would be great but still needs to use the
-    // full userId to disambiguate if needed...
-
-    if (!displayName) {
-        var matches = selfUserId.match(/^@(.*?):/);
-        if (matches) {
-            return matches[1];
-        }
-        else {
-            return selfUserId;
-        }
-    }
-    */
-
     if (!displayName) {
         return selfUserId;
     }