wireguard: selftests: remove duplicated include <sys/types.h>

This commit removes a duplicated include.
Signed-off-by: NYueHaibing <yuehaibing@huawei.com>
Signed-off-by: NJason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

tools/testing/selftests/wireguard/qemu/init.c

@@ -13,7 +13,6 @@
 #include <fcntl.h>
 #include <sys/wait.h>
 #include <sys/mount.h>
-#include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <sys/io.h>