ata: libata: Remove obsolete function declarations

The function ata_schedule_scsi_eh() was removed with commit
f8bbfc24 ("[PATCH] SCSI: make scsi_implement_eh() generic API for
SCSI transports"), and the function ata_sff_irq_clear() was removed
with commit 37f65b8b("libata-sff: ata_sff_irq_clear() is BMDMA
specific").

Remove the now useless declarations of these functions in
drivers/ata/libata.h and include/linux/libata.h.
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>

drivers/ata/libata.h

@@ -124,7 +124,6 @@ extern void ata_scsi_set_sense_information(struct ata_device *dev,
 					   const struct ata_taskfile *tf);
 extern void ata_scsi_media_change_notify(struct ata_device *dev);
 extern void ata_scsi_hotplug(struct work_struct *work);
-extern void ata_schedule_scsi_eh(struct Scsi_Host *shost);
 extern void ata_scsi_dev_rescan(struct work_struct *work);
 extern int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
 			      unsigned int id, u64 lun);

include/linux/libata.h

@@ -2006,7 +2006,6 @@ extern unsigned int ata_sff_data_xfer(struct ata_queued_cmd *qc,
 extern unsigned int ata_sff_data_xfer32(struct ata_queued_cmd *qc,
 			unsigned char *buf, unsigned int buflen, int rw);
 extern void ata_sff_irq_on(struct ata_port *ap);
-extern void ata_sff_irq_clear(struct ata_port *ap);
 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
 			    u8 status, int in_wq);
 extern void ata_sff_queue_work(struct work_struct *work);