[resizeTS] more kludges to deal w/ weird files
[resizeTS] rm kludges, low JPEG qual & INTER_CUBIC

Remove the kludges from the last couple of commits & earlier that stop
errors being printed on missing/empty files. Now, the errors are just
never printed, as we return silently instead of raising if the imread
returns None. We still catch cv2.error, but now it can only be raised by
some weird fuckup in resize or imread/imsave, not by files being
null/missing/empty