Don't send XmppPeerInfo UVE on table subscribe/unsubscribe

The UVE has a list of tables to which the xmpp peer is registered.
Building and sending the entire list of tables each time the peer
subscribes and unsubscribes to a table is very expensive.

Do not send the UVE for the time being. Will resume sending the UVE
after new infra to make incremental updates to a list is available.

Change-Id: I1905755f665432e5cfc0229099e88bcc3bbf6b4c
Partial-Bug: 1456284

src/bgp/bgp_xmpp_channel.cc

@@ -1901,18 +1901,6 @@ bool BgpXmppChannel::MembershipResponseHandler(string table_name) {
 
     // Erase all elements for the table
     defer_q_.erase(vrf_n_table);
-
-    vector<string> registered_tables;
-    mgr->FillRegisteredTable(peer_.get(), &registered_tables);
-    if (registered_tables.empty())
-        return true;
-
-    XmppPeerInfoData peer_info;
-    peer_info.set_name(peer_->ToUVEKey());
-    peer_info.set_routing_tables(registered_tables);
-    peer_info.set_send_state("in sync");
-    XMPPPeerInfo::Send(peer_info);
-
     return true;
 }