bmw: Remove duplicated include of header file

Signed-off-by: Thomas Weber <weber@corscience.de>

board/bmw/bmw.c

@@ -21,7 +21,6 @@
  * MA 02111-1307 USA
  */
 
-#include <common.h>
 #include <common.h>
 #include <watchdog.h>
 #include <command.h>