Tidying up comments

Author: photonstorm

v3/src/math/Percent.js

@@ -2,7 +2,7 @@
  * Work out what percentage `value` is of the range between `min` and `max`.
  * If `max` isn't given then it will return the percentage of `value` to `min`.
  *
- * You can optionally specify an `upperMax` value, which is a mid-way point in the range that represents 100%, after which the % starts to go down to the zero again.
+ * You can optionally specify an `upperMax` value, which is a mid-way point in the range that represents 100%, after which the % starts to go down to zero again.
  *
  * @function Phaser.Math.Percent
  * @since 3.0.0

v3/src/scene/plugins/UpdateList.js

@@ -93,7 +93,6 @@ var UpdateList = new Class({
         return this;
     },
 
-    //  Scene that owns this Clock is shutting down
     shutdown: function ()
     {
         this.removeAll();
@@ -103,7 +102,6 @@ var UpdateList = new Class({
         this._pendingInsertion.length = 0;
     },
 
-    //  Game level nuke
     destroy: function ()
     {
         this.shutdown();