staging: rtl8188eu: core: Remove file rtw_br_ext.c

functions defined in rtw_br_ext.c are not being used by driver anymore.
Signed-off-by: navin patidar <navin.patidar@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8188eu/Makefile

 r8188eu-y :=				\
 		core/rtw_ap.o		\
-		core/rtw_br_ext.o	\
 		core/rtw_cmd.o		\
 		core/rtw_debug.o	\
 		core/rtw_efuse.o	\