Remove OnChangeListener from ExtendedFab

PiperOrigin-RevId: 266955697

Author: ymarian

lib/java/com/google/android/material/floatingactionbutton/ExtendedFloatingActionButton.java

@@ -89,14 +89,6 @@ public class ExtendedFloatingActionButton extends MaterialButton implements Atta
   private boolean isExtended = true;
   private boolean isUsingPillCorner = true;
 
-  /**
-   * @deprecated use {@link OnChangedCallback}
-   */
-  @Deprecated
-  public abstract static class OnChangedListener extends OnChangedCallback {
-
-  }
-
   /**
    * Callback to be invoked when the visibility or the state of an ExtendedFloatingActionButton
    * changes.