IB/srp: Remove driver version and release data information

Remove the driver version and release date information because such
information is not relevant for an upstream driver. See also commit
e1267b01 ("RDMA: Remove useless MODULE_VERSION").

Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>