rcon: don't expect two packets for authentication

src/rcon.c

@@ -176,21 +176,6 @@ int rcon_authenticate(int sockfd, const char *password) {
         return -1;
     }
 
-    // TODO: why do we expect two packets in response to a single auth request?
-    //       if this is the correct behaviour, please document it or else remove it.
-    // Try to read second packet (may timeout, which is OK)
-    rcon_packet_t response2;
-    int result = recv_packet(sockfd, &response2);
-    if (result == 0) {
-        printf("received second auth packet: id=%d, type=%d\n", response2.id, response2.type);
-        if (response2.type != RCON_SERVERDATA_AUTH_RESPONSE) {
-            fprintf(stderr, "authentication failed - unexpected second packet type: %d\n", response2.type);
-            return -1;
-        }
-    } else if (result == -2) {
-        printf("no second packet (timeout - this is normal)\n");
-    }
-
     printf("authenticated successfully\n");
     return 0;
 }