Remove getGeometry() from the API

changelog/upgrade-notes.md

@@ -2,6 +2,10 @@
 
 ### Next release
 
+#### Removal of `ol.render.Feature#getGeometry()`
+
+The `ol.render.Feature#getGeometry()` function simply returns the feature itself. Users who relied on this function can use the `ol.render.Feature` instance directly instead.
+
 ### v4.1.0
 
 #### Adding duplicate layers to a map throws

src/ol/render/feature.js

@@ -104,7 +104,6 @@ ol.render.Feature.prototype.getFlatCoordinates =
 /**
  * Get the feature for working with its geometry.
  * @return {ol.render.Feature} Feature.
- * @api
  */
 ol.render.Feature.prototype.getGeometry = function() {
   return this;