rtc: remove rtc_time_to_tm and rtc_tm_to_time

There are no callers of the 32bit versions of rtc_time conversion
functions, drop them.

Link: https://lore.kernel.org/r/20200330201510.861217-1-alexandre.belloni@bootlin.comSigned-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

include/linux/rtc.h

@@ -34,18 +34,6 @@ static inline time64_t rtc_tm_sub(struct rtc_time *lhs, struct rtc_time *rhs)
 	return rtc_tm_to_time64(lhs) - rtc_tm_to_time64(rhs);
 }
 
-static inline void rtc_time_to_tm(unsigned long time, struct rtc_time *tm)
-{
-	rtc_time64_to_tm(time, tm);
-}
-
-static inline int rtc_tm_to_time(struct rtc_time *tm, unsigned long *time)
-{
-	*time = rtc_tm_to_time64(tm);
-
-	return 0;
-}
-
 #include <linux/device.h>
 #include <linux/seq_file.h>
 #include <linux/cdev.h>