scsi: target: Remove incorrect zero blocks WRITE_SAME check

We use WSNZ=1 so if we get a WRITE_SAME with zero logical blocks we are
supposed to fail it. We do this check and failure in target_core_sbc.c
before calling into the backend, so we can remove the incorrect check in
target_core_file.

Link: https://lore.kernel.org/r/20220628200230.15052-2-michael.christie@oracle.com
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Author: mikechristie

drivers/target/target_core_file.c

@@ -438,10 +438,6 @@ fd_execute_write_same(struct se_cmd *cmd)
 	unsigned int len = 0, i;
 	ssize_t ret;
 
-	if (!nolb) {
-		target_complete_cmd(cmd, SAM_STAT_GOOD);
-		return 0;
-	}
 	if (cmd->prot_op) {
 		pr_err("WRITE_SAME: Protection information with FILEIO"
 		       " backends not supported\n");