scsi: infiniband: srpt: Remove default fabric ops callouts

Remove callouts that are identical to the default implementations in TCM
Core.

Signed-off-by: Dmitry Bogdanov <d.bogdanov@yadro.com>
Link: https://lore.kernel.org/r/20230313181110.20566-3-d.bogdanov@yadro.com


Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>