power: supply: ab8500: Remove unused struct ab8500_chargalg_sysfs_entry

After commit 75ee3f6f("power: supply: ab8500_chargalg: Drop enable/disable
sysfs"), no one use struct ab8500_chargalg_sysfs_entry, so remove it.
Signed-off-by: Yuan Can <yuancan@huawei.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

drivers/power/supply/ab8500_chargalg.c

@@ -252,12 +252,6 @@ static enum power_supply_property ab8500_chargalg_props[] = {
 	POWER_SUPPLY_PROP_HEALTH,
 };
 
-struct ab8500_chargalg_sysfs_entry {
-	struct attribute attr;
-	ssize_t (*show)(struct ab8500_chargalg *di, char *buf);
-	ssize_t (*store)(struct ab8500_chargalg *di, const char *buf, size_t length);
-};
-
 /**
  * ab8500_chargalg_safety_timer_expired() - Expiration of the safety timer
  * @timer:     pointer to the hrtimer structure