Hit-detect skipped features, but not on unmanaged layer

src/ol/source/vectorsource.js

@@ -738,16 +738,6 @@ ol.source.Vector.prototype.handleFeatureChange_ = function(event) {
 };
 
 
-/**
- * @param {ol.Feature} feature Feature.
- * @return {boolean} Feature is in source.
- */
-ol.source.Vector.prototype.hasFeature = function(feature) {
-  var id = feature.getId();
-  return id ? id in this.idIndex_ : goog.getUid(feature) in this.undefIdIndex_;
-};
-
-
 /**
  * @return {boolean} Is empty.
  */