package/gtkiostream: remove optional dependency to opencv3

OpenCV3 is unmaintained and will be removed from buildroot.

Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/gtkiostream/gtkiostream.mk

@@ -47,10 +47,6 @@ ifeq ($(BR2_PACKAGE_LIBWEBSOCKETS),y)
 GTKIOSTREAM_DEPENDENCIES += libwebsockets
 endif
 
-ifeq ($(BR2_PACKAGE_OPENCV3),y)
-GTKIOSTREAM_DEPENDENCIES += opencv3
-endif
-
 ifeq ($(BR2_PACKAGE_SOX),y)
 GTKIOSTREAM_DEPENDENCIES += sox
 endif