Remove workaround to prevent camera from going underground

src/olcs/OLCesium.js

@@ -294,14 +294,6 @@ class OLCesium {
 
     const eventHelper = new Cesium.EventHelper();
     eventHelper.add(this.scene_.postRender, OLCesium.prototype.updateTrackedEntity_, this);
-
-    // Cesium has a mechanism to prevent the camera to go under the terrain.
-    // Unfortunately, it is only active when all the terrain has been loaded, which:
-    // - does not prevent the camera to sink under terrain anymore;
-    // - introduce a jumping effect once all terrain has been loaded and the position of the camera is finally fixed.
-    // The property below enables a workaround found in the Camptocamp Cesium fork.
-    // See also https://github.com/AnalyticalGraphicsInc/cesium/issues/5999.
-    Cesium.Camera.enableSuspendTerrainAdjustment = false;
   }
 
   /**