staging: vboxvideo: remove unused variables

Fix compiler warnings:
vbox_mode.c:57:15: warning: variable ‘crtc_id’ set but not used
vbox_mode.c:581:25: warning: variable ‘vbox_connector’ set but not used
Signed-off-by: Paolo Cretaro <paolocretaro@gmail.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Michael Thayer <michael.thayer@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vboxvideo/vbox_mode.c

@@ -54,14 +54,12 @@ static void vbox_do_modeset(struct drm_crtc *crtc,
 	struct vbox_crtc *vbox_crtc = to_vbox_crtc(crtc);
 	struct vbox_private *vbox;
 	int width, height, bpp, pitch;
-	unsigned int crtc_id;
 	u16 flags;
 	s32 x_offset, y_offset;
 
 	vbox = crtc->dev->dev_private;
 	width = mode->hdisplay ? mode->hdisplay : 640;
 	height = mode->vdisplay ? mode->vdisplay : 480;
-	crtc_id = vbox_crtc->crtc_id;
 	bpp = crtc->enabled ? CRTC_FB(crtc)->format->cpp[0] * 8 : 32;
 	pitch = crtc->enabled ? CRTC_FB(crtc)->pitches[0] : width * bpp / 8;
 	x_offset = vbox->single_framebuffer ? crtc->x : vbox_crtc->x_hint;
@@ -578,9 +576,6 @@ static int vbox_mode_valid(struct drm_connector *connector,
 
 static void vbox_connector_destroy(struct drm_connector *connector)
 {
-	struct vbox_connector *vbox_connector;
-
-	vbox_connector = to_vbox_connector(connector);
 	drm_connector_unregister(connector);
 	drm_connector_cleanup(connector);
 	kfree(connector);