staging: rtl8188eu: remove redundant header file

Both functions declared in rtl8188e_led.h are also declared in
rtw_led.h which is included from drv_types.h. Remove rtl8188e_led.h
and it's includes.

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>