staging: r8188eu: Remove rtw_division64()

This wrapper is never used.
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Link: https://lore.kernel.org/r/20210803135223.12543-8-Larry.Finger@lwfinger.netSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/include/osdep_service.h

@@ -354,7 +354,6 @@ void rtw_free_netdev(struct net_device *netdev);
 #define rtw_signal_process(pid, sig) kill_pid(find_vpid((pid)),(sig), 1)
 
 u64 rtw_modular64(u64 x, u64 y);
-u64 rtw_division64(u64 x, u64 y);
 
 /* Macros for handling unaligned memory accesses */
 

drivers/staging/r8188eu/os_dep/osdep_service.c

@@ -316,12 +316,6 @@ u64 rtw_modular64(u64 x, u64 y)
 	return do_div(x, y);
 }
 
-u64 rtw_division64(u64 x, u64 y)
-{
-	do_div(x, y);
-	return x;
-}
-
 void rtw_buf_free(u8 **buf, u32 *buf_len)
 {
 	*buf_len = 0;