Remove video surface adapter parameter for callback media players

It is not used for callback players, only for AWT integration for
video surfaces like Canvas.

src/main/java/uk/co/caprica/vlcj/factory/VideoSurfaceApi.java

@@ -73,7 +73,7 @@ public ComponentIdVideoSurface newVideoSurface(long componentId) {
      * @return video surface
      */
     public CallbackVideoSurface newVideoSurface(BufferFormatCallback bufferFormatCallback, RenderCallback renderCallback, boolean lockBuffers) {
-        return new CallbackVideoSurface(bufferFormatCallback, renderCallback, lockBuffers, VideoSurfaceAdapters.getVideoSurfaceAdapter());
+        return new CallbackVideoSurface(bufferFormatCallback, renderCallback, lockBuffers);
     }
 
     /**

src/main/java/uk/co/caprica/vlcj/player/embedded/videosurface/CallbackVideoSurface.java

@@ -61,10 +61,9 @@ public class CallbackVideoSurface extends VideoSurface {
      * @param bufferFormatCallback callback providing the video buffer format
      * @param renderCallback callback used to render the video frame buffer
      * @param lockBuffers <code>true</code> if the video buffer should be locked; <code>false</code> if not
-     * @param videoSurfaceAdapter adapter to attach a video surface to a native media player
      */
-    public CallbackVideoSurface(BufferFormatCallback bufferFormatCallback, RenderCallback renderCallback, boolean lockBuffers, VideoSurfaceAdapter videoSurfaceAdapter) {
-        super(videoSurfaceAdapter);
+    public CallbackVideoSurface(BufferFormatCallback bufferFormatCallback, RenderCallback renderCallback, boolean lockBuffers) {
+        super(null);
 
         this.bufferFormatCallback = bufferFormatCallback;
         this.renderCallback = renderCallback;

src/main/java/uk/co/caprica/vlcj/player/embedded/videosurface/VideoSurface.java

@@ -30,13 +30,15 @@ public abstract class VideoSurface {
 
     /**
      * Operating System specific video surface adapter implementation.
+     * <p>
+     * May be <pre>null</pre>, e.g. for "callback" media players.
      */
     protected final VideoSurfaceAdapter videoSurfaceAdapter;
 
     /**
      * Create a new video surface wrapper.
      *
-     * @param videoSurfaceAdapter video surface adapter implementation
+     * @param videoSurfaceAdapter video surface adapter implementation, may be <pre>null</pre>
      */
     protected VideoSurface(VideoSurfaceAdapter videoSurfaceAdapter) {
         this.videoSurfaceAdapter = videoSurfaceAdapter;