QUIC: remove unused server designated connection ID

Change-Id: Id51dceb772d031e480493297c0538489b134f5d9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2258421
Auto-Submit: Nick Harper <nharper@chromium.org>
Commit-Queue: David Schinazi <dschinazi@chromium.org>
Reviewed-by: David Schinazi <dschinazi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#781168}

net/quic/quic_stream_factory.cc

@@ -2011,8 +2011,6 @@ void QuicStreamFactory::InitializeCachedStateInCryptoConfig(
     quic::QuicConnectionId* connection_id) {
   quic::QuicCryptoClientConfig::CachedState* cached =
       crypto_config_handle.GetConfig()->LookupOrCreate(server_id);
-  if (cached->has_server_designated_connection_id())
-    *connection_id = cached->GetNextServerDesignatedConnectionId();
 
   if (!cached->IsEmpty()) {
     return;