ksmbd: remove SMB1 oplock level macros

ksmbd does not support SMB1. This patch remove SMB1 oplock level macros.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>