Do not use JPEG parser with MJPEG format

After running few tests it came to be clear that using jpegparse bin
cause FPS slowdown on long running applications. It was ok for taking
single images, but for longer video feed it is unacceptable.

webcam-capture-drivers/driver-gstreamer/src/main/java/com/github/sarxos/webcam/ds/gstreamer/GStreamerDevice.java

@@ -67,7 +67,6 @@ public class GStreamerDevice implements WebcamDevice, RGBDataSink.Listener, Webc
 	private Pipeline pipe = null;
 	private Element source = null;
 	private Element filter = null;
-	private Element jpegparse = null;
 	private Element jpegdec = null;
 	private Element[] elements = null;
 	private RGBDataSink sink = null;
@@ -136,7 +135,6 @@ private synchronized void init() {
 
 		filter = ElementFactory.make("capsfilter", "capsfilter");
 
-		jpegparse = ElementFactory.make("jpegparse", "jpegparse");
 		jpegdec = ElementFactory.make("jpegdec", "jpegdec");
 
 		pipelineReady();
@@ -306,7 +304,7 @@ private void pipelineElementsReset() {
 	private Element[] pipelineElementsPrepare() {
 		if (elements == null) {
 			if (FORMAT_MJPEG.equals(format)) {
-				elements = new Element[] { source, filter, jpegparse, jpegdec, sink };
+				elements = new Element[] { source, filter, jpegdec, sink };
 			} else {
 				elements = new Element[] { source, filter, sink };
 			}
@@ -371,7 +369,6 @@ public void dispose() {
 
 		source.dispose();
 		filter.dispose();
-		jpegparse.dispose();
 		jpegdec.dispose();
 		caps.dispose();
 		sink.dispose();