scsi: isci: Remove a declaration

There is no function with the name isci_queuecommand(). Hence remove the
declaration for isci_queuecommand().

Link: https://lore.kernel.org/r/20211007204618.2196847-12-bvanassche@acm.orgSigned-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/isci/task.h

@@ -182,8 +182,4 @@ void *isci_task_ssp_request_get_response_data_address(
 u32 isci_task_ssp_request_get_response_data_length(
 	struct isci_request *request);
 
-int isci_queuecommand(
-	struct scsi_cmnd *scsi_cmd,
-	void (*donefunc)(struct scsi_cmnd *));
-
 #endif /* !defined(_SCI_TASK_H_) */