iot-devkit-image.bb: remove opencv as v4l-utils has dependencies on x11
iot-devkit-image.bb: remove opencv as v4l-utils has dependencies on x11

Due to DISTRO_FEATURES removing x11, remove opencv from packages for now. Once
solution has been found for including v4l-utils this will be included again.

(meta-clanton rev: 598854910e6a3936f7bfed0ad3ba384718194b0d)

Signed-off-by: Brendan Le Foll <3e0e8c4069934e8b47d99704927a85c66c0ceb33@intel.com>
Signed-off-by: Paul Eggleton <737d4dae46a541673d7bf4e0d5b32714b16528d8@linux.intel.com>

MCherifiOSS/meta-intel-iot-devkit