selftests/bpf: Drop duplicate definition of i in test_sockmap

There's already a definition of i in run_options() at the beginning, no
need to define a new one in "if (tx_prog_fd > 0)" block.
Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Tested-by: Jakub Sitnicki <jakub@cloudflare.com>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/bpf/8d690682330a59361562bca75d6903253d16f312.1716446893.git.tanggeliang@kylinos.cn

tools/testing/selftests/bpf/test_sockmap.c

@@ -1030,7 +1030,7 @@ static int run_options(struct sockmap_options *options, int cg_fd,  int test)
 		tx_prog_fd = -1;
 
 	if (tx_prog_fd > 0) {
-		int redir_fd, i = 0;
+		int redir_fd;
 
 		err = bpf_prog_attach(tx_prog_fd,
 				      map_fd[1], BPF_SK_MSG_VERDICT, 0);
@@ -1041,6 +1041,7 @@ static int run_options(struct sockmap_options *options, int cg_fd,  int test)
 			goto out;
 		}
 
+		i = 0;
 		err = bpf_map_update_elem(map_fd[1], &i, &c1, BPF_ANY);
 		if (err) {
 			fprintf(stderr,