Remove 'struct' jsdoc tags, code indentation

src/ol/structs/LRUCache.js

@@ -24,7 +24,6 @@ class LRUCache extends EventTarget {
    * items from the cache is the responsibility of the user.
    *
    * @fires module:ol/events/Event~Event
-   * @struct
    * @template T
    * @param {number=} opt_highWaterMark High water mark.
    */

src/ol/structs/PriorityQueue.js

@@ -23,7 +23,6 @@ class PriorityQueue {
    *
    * @param {function(T): number} priorityFunction Priority function.
    * @param {function(T): string} keyFunction Key function.
-   * @struct
    * @template T
    */
   constructor(priorityFunction, keyFunction) {

src/ol/structs/RBush.js

@@ -22,7 +22,6 @@ class RBush {
    *
    * @param {number=} opt_maxEntries Max entries.
    * @see https://github.com/mourner/rbush
-   * @struct
    * @template T
    */
   constructor(opt_maxEntries) {