Remove right-handed polygon handling in renderer

Since ol.render.Feature assumes right-handed polygons anyway, this
extra optimization is not needed.

src/ol/format/featureformat.js

@@ -25,11 +25,6 @@ ol.format.Feature = function() {
    */
   this.defaultDataProjection = null;
 
-  /**
-   * @protected
-   * @type {boolean}
-   */
-  this.rightHandedPolygons = false;
 };
 
 
@@ -59,14 +54,6 @@ ol.format.Feature.prototype.getReadOptions = function(source, opt_options) {
 };
 
 
-/**
- * @return {boolean}
- */
-ol.format.Feature.prototype.getRightHandedPolygons = function() {
-  return this.rightHandedPolygons;
-};
-
-
 /**
  * Sets the `defaultDataProjection` on the options, if no `dataProjection`
  * is set.