PCI: cpcihp: Remove unused struct cpci_hp_controller_ops.hardware_test

The 'hardware_test' field in struct cpci_hp_controller_ops is unused;
remove it to reduce resource consumption.

Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Guilherme Giacomo Simoes <[e-mail]>
[bhelgas: commit log]
Signed-off-by: Bjorn Helgaas <[e-mail]>

drivers/pci/hotplug/cpci_hotplug.h

···
 	int (*enable_irq)(void);
 	int (*disable_irq)(void);
 	int (*check_irq)(void *dev_id);
-	int (*hardware_test)(struct slot *slot, u32 value);
 	u8  (*get_power)(struct slot *slot);
 	int (*set_power)(struct slot *slot, int value);
 };