sha1Or-k was a vestige from an early, never-released
attempt to handle some oddball cases of CRLF conversion (-k option).
Ultimately it wasn't needed, and I should have gotten rid of it
before submitting the CRLF patch in the first place.
See also 90948a42892779 (add ability to guess -kb from contents).
Signed-off-by: Matthew Ogilvie <mmogilvi_git@miniinfo.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>