fix comments

src/common/Grid.events.js

@@ -308,7 +308,7 @@ Grid.mixin({
 		var calendar = view.calendar;
 		var eventManager = calendar.eventManager;
 		var el = seg.el;
-		var event = seg.event;
+		var event = seg.event; // is a legacy event
 		var isDragging;
 		var mouseFollower; // A clone of the original element that will move with the mouse
 		var eventDefMutation;
@@ -715,7 +715,7 @@ Grid.mixin({
 		var calendar = view.calendar;
 		var eventManager = calendar.eventManager;
 		var el = seg.el;
-		var event = seg.event;
+		var event = seg.event; // legacy event
 		var isDragging;
 		var resizeMutation; // zoned event date properties. falsy if invalid resize
 

src/models/EventPeriod.js

@@ -354,7 +354,6 @@ var EventPeriod = Class.extend(EmitterMixin, {
 
 	release: function() {
 		this.releaseCnt++;
-		// TODO: dont re-convert to rangegroups
 		this.trigger('release', this.eventRangeGroupsById);
 	},
 
@@ -363,7 +362,6 @@ var EventPeriod = Class.extend(EmitterMixin, {
 		var _this = this;
 
 		if (this.releaseCnt) {
-			// TODO: dont re-convert to rangegroups
 			return Promise.resolve(this.eventRangeGroupsById);
 		}
 		else {