Remove extra imports in jsdoc

The symbols are already imported (es6 import)

src/ol/geom/Polygon.js

@@ -36,7 +36,7 @@ class Polygon extends SimpleGeometry {
    *     an array of vertices' coordinates where the first coordinate and the last are
    *     equivalent. (For internal use, flat coordinates in combination with
    *     `opt_layout` and `opt_ends` are also accepted.)
-   * @param {import("./GeometryLayout.js").default=} opt_layout Layout.
+   * @param {GeometryLayout=} opt_layout Layout.
    * @param {Array<number>=} opt_ends Ends (for internal use with flat coordinates).
    */
   constructor(coordinates, opt_layout, opt_ends) {
@@ -96,7 +96,7 @@ class Polygon extends SimpleGeometry {
 
   /**
    * Append the passed linear ring to this polygon.
-   * @param {import("./LinearRing.js").default} linearRing Linear ring.
+   * @param {LinearRing} linearRing Linear ring.
    * @api
    */
   appendLinearRing(linearRing) {
@@ -203,7 +203,7 @@ class Polygon extends SimpleGeometry {
 
   /**
    * Return an interior point of the polygon.
-   * @return {import("./Point.js").default} Interior point as XYM coordinate, where M is the
+   * @return {Point} Interior point as XYM coordinate, where M is the
    * length of the horizontal intersection that the point belongs to.
    * @api
    */
@@ -229,7 +229,7 @@ class Polygon extends SimpleGeometry {
    * at index `1` and beyond.
    *
    * @param {number} index Index.
-   * @return {import("./LinearRing.js").default} Linear ring.
+   * @return {LinearRing} Linear ring.
    * @api
    */
   getLinearRing(index) {
@@ -242,7 +242,7 @@ class Polygon extends SimpleGeometry {
 
   /**
    * Return the linear rings of the polygon.
-   * @return {Array<import("./LinearRing.js").default>} Linear rings.
+   * @return {Array<LinearRing>} Linear rings.
    * @api
    */
   getLinearRings() {
@@ -313,7 +313,7 @@ class Polygon extends SimpleGeometry {
   /**
    * Set the coordinates of the polygon.
    * @param {!Array<Array<import("../coordinate.js").Coordinate>>} coordinates Coordinates.
-   * @param {import("./GeometryLayout.js").default=} opt_layout Layout.
+   * @param {GeometryLayout=} opt_layout Layout.
    * @override
    * @api
    */