home_cam.py: remove python version detection
home_cam.py: remove python version detection

This detection code is redundant and not used.
Besides, we are expected to run Python3 always (see README.rst)

Signed-off-by: Erik Stromdahl <bceaca8caa2900989bb30a1257212196c3d2e7c8@gmail.com>

erstrom/opencv-home-cam,erstrom/opencv-home-cam