Make new behavior overridable; update docs and examples

examples/igc.js

@@ -1,7 +1,6 @@
 import Feature from '../src/ol/Feature.js';
 import Map from '../src/ol/Map.js';
 import View from '../src/ol/View.js';
-import {defaults as defaultControls} from '../src/ol/control.js';
 import IGC from '../src/ol/format/IGC.js';
 import {LineString, Point} from '../src/ol/geom.js';
 import {Tile as TileLayer, Vector as VectorLayer} from '../src/ol/layer.js';
@@ -93,11 +92,6 @@ const map = new Map({
     })
   ],
   target: 'map',
-  controls: defaultControls({
-    attributionOptions: {
-      collapsible: false
-    }
-  }),
   view: new View({
     center: [703365.7089403362, 5714629.865071137],
     zoom: 9