Always use load extent with real world center

src/ol/source/Vector.js

@@ -146,10 +146,6 @@ export class VectorSourceEvent extends Event {
  * @property {boolean} [wrapX=true] Wrap the world horizontally. For vector editing across the
  * -180° and 180° meridians to work properly, this should be set to `false`. The
  * resulting geometry coordinates will then exceed the world bounds.
- * @property {boolean} [loadWrapX=true] Call the loader with one world width either side
- * of the projection extent when the world is wrapped horizontally. This allows features
- * to be loaded in a single request, but may be inefficient. If `false` only the viewport
- * extent is used and the loader must determine the appropriate real world requests.
  */
 
 
@@ -190,12 +186,6 @@ class VectorSource extends Source {
      */
     this.format_ = options.format;
 
-    /**
-     * @private
-     * @type {boolean}
-     */
-    this.loadWrapX_ = options.loadWrapX === undefined ? true : options.loadWrapX;
-
     /**
      * @private
      * @type {boolean}
@@ -811,14 +801,6 @@ class VectorSource extends Source {
   }
 
 
-  /**
-   * @return {boolean} The loadWrapX option used to construct the source.
-   */
-  getLoadWrapX() {
-    return this.loadWrapX_;
-  }
-
-
   /**
    * @return {boolean} The source can have overlapping geometries.
    */