docs: remove unused param in javadoc

Author: javier-godoy

src/main/java/com/flowingcode/vaadin/addons/imagecrop/ImageCrop.java

@@ -140,8 +140,6 @@ public void setCrop(Crop crop) {
 
   /**
    * Gets the crop dimensions.
-   * 
-   * @param crop the current crop dimensions
    */
   public Crop getCrop() {
     return getState("crop", Crop.class);