selftests: net: remove unused variables

These variables are never referenced in the code, just remove them

Signed-off-by: zhujun2 <zhujun2@cmss.chinamobile.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

tools/testing/selftests/net/af_unix/scm_pidfd.c

@@ -294,7 +294,6 @@ static void fill_sockaddr(struct sock_addr *addr, bool abstract)
 static void client(FIXTURE_DATA(scm_pidfd) *self,
 		   const FIXTURE_VARIANT(scm_pidfd) *variant)
 {
-	int err;
 	int cfd;
 	socklen_t len;
 	struct ucred peer_cred;

tools/testing/selftests/net/af_unix/test_unix_oob.c

@@ -180,9 +180,7 @@ main(int argc, char **argv)
 	char buf[1024];
 	int on = 0;
 	char oob;
-	int flags;
 	int atmark;
-	char *tmp_file;
 
 	lfd = socket(AF_UNIX, SOCK_STREAM, 0);
 	memset(&consumer_addr, 0, sizeof(consumer_addr));

tools/testing/selftests/net/nettest.c

@@ -1864,8 +1864,9 @@ static char *random_msg(int len)
 		n += i;
 		len -= i;
 	}
-	i = snprintf(m + n, olen - n, "%.*s", len,
-		     "abcdefghijklmnopqrstuvwxyz");
+
+	snprintf(m + n, olen - n, "%.*s", len,
+	     "abcdefghijklmnopqrstuvwxyz");
 	return m;
 }