Staging: rtl8187se: remove unused #include <linux/version.h>

Remove unused #include <linux/version.h>('s) in
  drivers/staging/rtl8187se/ieee80211/ieee80211_rx.c
  drivers/staging/rtl8187se/ieee80211/ieee80211_tx.c
  drivers/staging/rtl8187se/ieee80211/ieee80211_wx.c

Signed-off-by: Huang Weiyi <weiyi.huang@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>