nfsd: remove bogus setting of status in nfsd4_process_open2

status is always reset after this (and it doesn't make much sense there
anyway).

Signed-off-by: Jeff Layton <jeff.layton@primarydata.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>