GStreamer: remove unused function and enum.

Change-Id: I67b329784d94e60b94c10d4a8942d02b050e0b2c
Reviewed-by: Christian Stromme <christian.stromme@theqtcompany.com>

src/plugins/gstreamer/camerabin/camerabinsession.cpp

@@ -250,11 +250,6 @@ CameraBinLocks *CameraBinSession::cameraLocksControl()
 }
 #endif
 
-CameraBinSession::CameraRole CameraBinSession::cameraRole() const
-{
-    return BackCamera;
-}
-
 bool CameraBinSession::setupCameraBin()
 {
     if (!buildCameraSource())

src/plugins/gstreamer/camerabin/camerabinsession.h

@@ -83,11 +83,6 @@ class CameraBinSession : public QObject,
     Q_PROPERTY(qint64 duration READ duration NOTIFY durationChanged)
     Q_INTERFACES(QGstreamerBusMessageFilter QGstreamerSyncMessageFilter)
 public:
-    enum CameraRole {
-       FrontCamera, // Secondary camera
-       BackCamera // Main photo camera
-    };
-
     CameraBinSession(GstElementFactory *sourceFactory, QObject *parent);
     ~CameraBinSession();
 
@@ -98,8 +93,6 @@ public:
     GstElement *cameraSource() { return m_videoSrc; }
     QGstreamerBusHelper *bus() { return m_busHelper; }
 
-    CameraRole cameraRole() const;
-
     QList< QPair<int,int> > supportedFrameRates(const QSize &frameSize, bool *continuous) const;
     QList<QSize> supportedResolutions(QPair<int,int> rate, bool *continuous, QCamera::CaptureModes mode) const;