s390/pci: remove unused function zpci_rescan()

the only caller of this was removed as part of the suspend/resume
removal so no need to keep this function around.

Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

arch/s390/include/asm/pci.h

@@ -233,12 +233,10 @@ static inline bool zpci_use_mio(struct zpci_dev *zdev)
 /* Error handling and recovery */
 void zpci_event_error(void *);
 void zpci_event_availability(void *);
-void zpci_rescan(void);
 bool zpci_is_enabled(void);
 #else /* CONFIG_PCI */
 static inline void zpci_event_error(void *e) {}
 static inline void zpci_event_availability(void *e) {}
-static inline void zpci_rescan(void) {}
 #endif /* CONFIG_PCI */
 
 #ifdef CONFIG_HOTPLUG_PCI_S390

arch/s390/pci/pci.c

@@ -890,9 +890,3 @@ out:
 	return rc;
 }
 subsys_initcall_sync(pci_base_init);
-
-void zpci_rescan(void)
-{
-	if (zpci_is_enabled())
-		clp_rescan_pci_devices_simple(NULL);
-}