scsi: iscsi_tcp: Remove unneeded selections of CRYPTO and CRYPTO_MD5

scsi: iscsi_tcp: Remove unneeded selections of CRYPTO and CRYPTO_MD5

As far as I can tell, CRYPTO_MD5 has been unnecessary here ever since it
was added by commit c899e4ef96f0 ("[SCSI] open-iscsi/linux-iscsi-5
Initiator: Kconfig update") in 2005.

CRYPTO was needed until commit 92186c1455a2 ("scsi: iscsi_tcp: Switch to
using the crc32c library"), but is no longer needed.

Remove these unnecessary kconfig selections.

Signed-off-by: Eric Biggers <ebiggers@kernel.org>
Link: https://patch.msgid.link/20260404203003.33738-1-ebiggers@kernel.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>