vswitchd: Remove support for deprecated "null" interfaces.

This interface type was deprecated in 2013, so it is time to remove it.

Signed-off-by: Ben Pfaff <blp@ovn.org>
Acked-by: Justin Pettit <jjpettit@ovn.org>

NEWS

@@ -5,6 +5,7 @@ Post-v2.9.0
      * Previous versions gave OpenFlow tables default names of the form
        "table#".  These are not helpful names for the purpose of accepting
        and displaying table names, so now tables by default have no names.
+     * The "null" interface type, deprecated since 2013, has been removed.
    - ovs-ofctl:
      * ovs-ofctl now accepts and display table names in place of numbers.  By
        default it always accepts names and in interactive use it displays them;

vswitchd/bridge.c

@@ -3448,11 +3448,6 @@ bridge_del_ports(struct bridge *br, const struct shash *wanted_ports)
             if (iface) {
                 iface->cfg = cfg;
                 iface->type = type;
-            } else if (!strcmp(type, "null")) {
-                VLOG_WARN_ONCE("%s: The null interface type is deprecated and"
-                               " may be removed in February 2013. Please email"
-                               " dev@openvswitch.org with concerns.",
-                               cfg->name);
             } else {
                 /* We will add new interfaces later. */
             }
@@ -4074,11 +4069,7 @@ port_del_ifaces(struct port *port)
     /* Collect list of new interfaces. */
     sset_init(&new_ifaces);
     for (i = 0; i < port->cfg->n_interfaces; i++) {
-        const char *name = port->cfg->interfaces[i]->name;
+        sset_add(&new_ifaces, port->cfg->interfaces[i]->name);
-        const char *type = port->cfg->interfaces[i]->type;
-        if (strcmp(type, "null")) {
-            sset_add(&new_ifaces, name);
-        }
     }
 
     /* Get rid of deleted interfaces. */

vswitchd/vswitch.xml

@@ -2270,10 +2270,6 @@
           <dd>
             A pair of virtual devices that act as a patch cable.
           </dd>
-
-          <dt><code>null</code></dt>
-          <dd>An ignored interface. Deprecated and slated for removal in
-          February 2013.</dd>
         </dl>
       </column>
     </group>