hwmon: Drop needless includes of <linux/delay.h>

These drivers use no sleep or delay functions so they don't need to
include <linux/delay.h>.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Cc: Rudolf Marek <r.marek@assembler.cz>

drivers/hwmon/pmbus/pmbus_core.c

@@ -26,7 +26,6 @@
 #include <linux/i2c.h>
 #include <linux/hwmon.h>
 #include <linux/hwmon-sysfs.h>
-#include <linux/delay.h>
 #include <linux/jiffies.h>
 #include <linux/i2c/pmbus.h>
 #include "pmbus.h"