gf_w64.c: remove dead assigments in gf_w64_shift_multiply()
gf_w64.c: remove dead assigments in gf_w64_shift_multiply()

These assigments are never used and directly overwritten later
in the function.

Signed-off-by: Danny Al-Gaaf <473e39ac77cf392f0dd9bacde8409de76c14d006@bisect.de>

zzxuanyuan/gf-complete,cedricde/gf-complete,zzxuanyuan/gf-complete,ceph/gf-complete,ceph/gf-complete,ceph/gf-complete,cedricde/gf-complete