net: wan: atp: remove unused eeprom_delay()

atp.h is included only by atp.c, which does not use eeprom_delay(). Remove
the unused definition.

Signed-off-by: Bjorn Helgaas <[e-mail]>
Signed-off-by: Jakub Kicinski <[e-mail]>

drivers/net/ethernet/realtek/atp.h

···
 #define EE_DATA_WRITE	0x01	/* EEPROM chip data in. */
 #define EE_DATA_READ	0x08	/* EEPROM chip data out. */
 
-/* Delay between EEPROM clock transitions. */
-#define eeprom_delay(ticks) \
-do { int _i = 40; while (--_i > 0) { __SLOW_DOWN_IO; } } while (0)
-
 /* The EEPROM commands include the alway-set leading bit. */
 #define EE_WRITE_CMD(offset)	(((5 << 6) + (offset)) << 17)
 #define EE_READ(offset)		(((6 << 6) + (offset)) << 17)