Revert "Gnu tools need to include what they use."

This reverts commit 7e2d6539df058b5435a6edd05b3a5e2722d7100c.

Adding this broke other pieces, causing multiple definitions of
in_addr6.

Change-Id: I7475bb48666909bc6a6376a76fa8aa55abd68db6
diff --git a/arm-linux-gnueabihf/sys-root/usr/include/linux/if_bridge.h b/arm-linux-gnueabihf/sys-root/usr/include/linux/if_bridge.h
index c68b115..aac8b8c 100644
--- a/arm-linux-gnueabihf/sys-root/usr/include/linux/if_bridge.h
+++ b/arm-linux-gnueabihf/sys-root/usr/include/linux/if_bridge.h
@@ -14,7 +14,6 @@
 #define _LINUX_IF_BRIDGE_H
 
 #include <linux/types.h>
-#include <linux/in6.h>
 
 #define SYSFS_BRIDGE_ATTR	"bridge"
 #define SYSFS_BRIDGE_FDB	"brforward"