Removed un-used property.

Author: photonstorm

src/tilemaps/Tileset.js

@@ -178,15 +178,6 @@ var Tileset = new Class({
          * @since 3.0.0
         */
         this.texCoordinates = [];
-
-        /**
-         * A look-up map that converts between Tiled 1.1 and Tiled 1.2 tile data.
-         *
-         * @name Phaser.Tilemaps.Tileset#tileIndexMap
-         * @type {object}
-         * @since 3.14.0
-        */
-        this.tileIndexMap = null;
     },
 
     /**
@@ -368,7 +359,7 @@ var Tileset = new Class({
 
         if (rowCount % 1 !== 0 || colCount % 1 !== 0)
         {
-            console.warn('Tileset ' + this.name + ' image tile area is not an even multiple of tile size');
+            console.warn('Image tile area not tile size multiple in: ' + this.name);
         }
 
         // In Tiled a tileset image that is not an even multiple of the tile dimensions is truncated