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

Signed-off-by: zhujun2 <zhujun2@cmss.chinamobile.com>
---
 tools/testing/selftests/net/af_unix/scm_pidfd.c     | 1 -
 tools/testing/selftests/net/af_unix/test_unix_oob.c | 2 --
 tools/testing/selftests/net/nettest.c               | 5 +++--
 3 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/tools/testing/selftests/net/af_unix/scm_pidfd.c b/tools/testing/selftests/net/af_unix/scm_pidfd.c
index a86222143..7e5345941 100644
--- a/tools/testing/selftests/net/af_unix/scm_pidfd.c
+++ b/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;
diff --git a/tools/testing/selftests/net/af_unix/test_unix_oob.c b/tools/testing/selftests/net/af_unix/test_unix_oob.c
index 532459a15..a7c51889a 100644
--- a/tools/testing/selftests/net/af_unix/test_unix_oob.c
+++ b/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));
diff --git a/tools/testing/selftests/net/nettest.c b/tools/testing/selftests/net/nettest.c
index 39a0e01f8..cd8a58097 100644
--- a/tools/testing/selftests/net/nettest.c
+++ b/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;
 }
 
-- 
2.17.1

Hello:

This patch was applied to netdev/net-next.git (main)
by David S. Miller <davem@davemloft.net>:

On Sun, 15 Oct 2023 23:30:39 -0700 you wrote:
> These variables are never referenced in the code, just remove them
> 
> Signed-off-by: zhujun2 <zhujun2@cmss.chinamobile.com>
> ---
>  tools/testing/selftests/net/af_unix/scm_pidfd.c     | 1 -
>  tools/testing/selftests/net/af_unix/test_unix_oob.c | 2 --
>  tools/testing/selftests/net/nettest.c               | 5 +++--
>  3 files changed, 3 insertions(+), 5 deletions(-)

Here is the summary with links:
  - selftests: net: remove unused variables
    https://git.kernel.org/netdev/net-next/c/3c4fe89878fe

You are awesome, thank you!
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