Don't mention packet cloning when failing to find tunnel

Packet cloning is relevant to multichassis ports only, so the message
made no sense for single chassis ports with no additional_chassis.

Even for multichassis ports, this part of the message is redundant and
confusing. It's better to remove it.

Signed-off-by: Ihar Hrachyshka <ihrachys@redhat.com>
Signed-off-by: Dumitru Ceara <dceara@redhat.com>
(cherry picked from commit a9051a1)

controller/physical.c

@@ -341,7 +341,7 @@ get_remote_tunnels(const struct sbrec_port_binding *binding,
             static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1);
             VLOG_WARN_RL(
                 &rl, "Failed to locate tunnel to reach main chassis %s "
-                     "for port %s. Cloning packets disabled for the chassis.",
+                     "for port %s.",
                 binding->chassis->name, binding->logical_port);
         } else {
             struct tunnel *tun_elem = xmalloc(sizeof *tun_elem);
@@ -363,7 +363,7 @@ get_remote_tunnels(const struct sbrec_port_binding *binding,
             static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1);
             VLOG_WARN_RL(
                 &rl, "Failed to locate tunnel to reach additional chassis %s "
-                     "for port %s. Cloning packets disabled for the chassis.",
+                     "for port %s.",
                 binding->additional_chassis[i]->name, binding->logical_port);
             continue;
         }