Update examples

examples/hello_client.c

@@ -10,26 +10,21 @@ int main(void)
 
     Sock *sock = sock_create(SOCK_IPV4, SOCK_TCP);
     if (sock == NULL) { err = "create"; goto defer; }
-    printf("create\n");
 
     SockAddr addr = sock_addr("127.0.0.1", 6969);
 
     if (!sock_connect(sock, addr)) { err = "connect"; goto defer; }
-    printf("connect\n");
 
     const char *msg = "Hello from client!";
     char buf[128];
     memset(buf, 0, sizeof(buf));
 
     sock_send(sock, msg, strlen(msg));
-    printf("send\n");
     sock_recv(sock, buf, sizeof(buf));
-    printf("recv\n");
     printf("%.*s\n", (int)sizeof(buf), buf);
 
 defer:
     sock_close(sock);
-    printf("close\n");
     fprintf(stderr, "ERROR: %s: %s\n", err, strerror(errno));
 
     return 0;