staging: r8188eu: Remove dead file

After the previous cleanups, file hal/odm_interface.c is now empty. It
is hereby deleted, and removed from Makefile.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8188eu/Makefile

@@ -34,7 +34,6 @@ r8188eu-y :=				\
 		hal/hal_com.o		\
 		hal/odm.o		\
 		hal/odm_debug.o		\
-		hal/odm_interface.o	\
 		hal/odm_HWConfig.o	\
 		hal/odm_RegConfig8188E.o\
 		hal/odm_RTL8188E.o	\

drivers/staging/rtl8188eu/hal/odm_interface.c

@@ -1 +0,0 @@
-