Remove dimension property from geometries

This was only necessary when using the shared vertices structure.

src/ol/geom/point.js

@@ -22,12 +22,6 @@ ol.geom.Point = function(coordinates) {
    */
   this.coordinates_ = coordinates;
 
-  /**
-   * @type {number}
-   */
-  this.dimension = coordinates.length;
-  goog.asserts.assert(this.dimension >= 2);
-
   /**
    * @type {ol.Extent}
    * @private
@@ -82,6 +76,6 @@ ol.geom.Point.prototype.getType = function() {
  */
 ol.geom.Point.prototype.transform = function(transform) {
   var coordinates = this.getCoordinates();
-  transform(coordinates, coordinates, this.dimension);
+  transform(coordinates, coordinates, coordinates.length);
   this.bounds_ = null;
 };