opencv: imx: stop fetching tiny-dnn
With commit
f7ca9ef27 ("cleanup: drop dnn_modern") [1] tiny-dnn is no
longer used by any module. There is no need to prefetch it.
This was part of OpenCV 3.4.2.
Prevents:
| WARNING: opencv-4.5.2.imx-r0 do_unpack: QA Issue: opencv: SRC_URI uses unstable GitHub/GitLab archives, convert recipe to use git protocol [src-uri-bad]
[1] https://github.com/opencv/opencv_contrib/commit/
f7ca9ef279bbb9d7bbb791548725d91e46725550
Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>