staging: r8188eu: remove unused timer functions

rtw_get_passing_time_ms and rtw_systime_to_ms are not used any more.
Remove them.
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20220413193654.258507-9-martin@kaiser.cxSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/include/osdep_service.h

@@ -77,9 +77,6 @@ void *rtw_malloc2d(int h, int w, int size);
 		spin_lock_init(&((q)->lock));			\
 	} while (0)
 
-u32  rtw_systime_to_ms(u32 systime);
-s32  rtw_get_passing_time_ms(u32 start);
-
 void rtw_usleep_os(int us);
 
 static inline unsigned char _cancel_timer_ex(struct timer_list *ptimer)

drivers/staging/r8188eu/os_dep/osdep_service.c

@@ -42,17 +42,6 @@ Otherwise, there will be racing condition.
 Caller must check if the list is empty before calling rtw_list_delete
 */
 
-inline u32 rtw_systime_to_ms(u32 systime)
-{
-	return systime * 1000 / HZ;
-}
-
-/*  the input parameter start use the same unit as jiffies */
-inline s32 rtw_get_passing_time_ms(u32 start)
-{
-	return rtw_systime_to_ms(jiffies - start);
-}
-
 void rtw_usleep_os(int us)
 {
 	if (1 < (us / 1000))