Remove cast API that already provides elemetal2

Author: manolo

lib/com/vaadin/polymer/Polymer.java

@@ -581,16 +581,10 @@ public native static <T> T apply(Object jso, String methodName, Object... args)
        return jso[methodName].apply(jso, args);
     }-*/;
 
-    public static native <T> T cast(Object o)
-    /*-{
-      return o;
-    }-*/;
-
     /**
      * Return the dom API of one element.
      */
     public static DomApi dom(Object element) {
         return Polymer.dom(element);
     }
 }
-

lib/com/vaadin/polymer/PolymerElement.java

@@ -3,9 +3,7 @@
 import static jsinterop.annotations.JsPackage.GLOBAL;
 
 import elemental2.dom.HTMLElement;
-import jsinterop.annotations.JsOverlay;
 import jsinterop.annotations.JsType;
-import com.vaadin.polymer.PolymerFunction;
 
 /**
  * PolymerElement is a class over the HTMLElement of elemental2 adding
@@ -17,7 +15,7 @@ public class PolymerElement extends HTMLElement {
 
     /** Properties and methods added by Polymer API **/
     public HTMLElement root;
-    public native void debounce(String name, PolymerFunction f, int timeout);
+    public native void debounce(String name, PolymerFunction<?, ?> f, int timeout);
     /**
      * Polymer’s custom property shim evaluates and applies custom property values once at element creation time.
      * In order to have an element (and its subtree) re- evaluate custom property values due to dynamic changes
@@ -27,16 +25,4 @@ public class PolymerElement extends HTMLElement {
 
     /** Missing properties in elemental2.dom.Element **/
     public String textContent;
-
-    /** Helper methods **/
-    @SuppressWarnings("unchecked")
-    @JsOverlay public final <T> T cast() {
-      return (T) this;
-    }
-
-    @SuppressWarnings("unchecked")
-    @JsOverlay public static final <T extends PolymerElement>T as(Object o) {
-      return (T) o;
-    }
-
 }