Revert "nfsd: warn on odd reply state in nfsd_vfs_read"

Revert "nfsd: warn on odd reply state in nfsd_vfs_read"

This reverts commit 6345f13d54bc80a5f790c0d50263be6ca4d7d283.

This is obviously wrong, and I have no idea how I missed seeing the
warning in testing: I must just not have looked at the right logs.  The
caller bumps rq_resused/rq_next_page, so it will always be hit on a
large enough read.

Reported-by: Dave Jones <davej@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>