Shrink the Connect message for message_bridge

The roboRIO doesn't have enough network buffer space for it anymore.
It is time to kill it.

Change-Id: Ia81aaba69d48e608157139b5079a6913677da2d7
diff --git a/aos/network/message_bridge_protocol.cc b/aos/network/message_bridge_protocol.cc
index 9663edf..0a4a50e 100644
--- a/aos/network/message_bridge_protocol.cc
+++ b/aos/network/message_bridge_protocol.cc
@@ -28,7 +28,12 @@
       for (const Connection *connection : *channel->destination_nodes()) {
         if (connection->name()->string_view() == node_name &&
             channel->source_node()->string_view() == remote_name) {
-          channel_offsets.emplace_back(CopyFlatBuffer<Channel>(channel, &fbb));
+          // Remove the schema to save some space on the wire.
+          aos::FlatbufferDetachedBuffer<Channel> cleaned_channel =
+              CopyFlatBuffer<Channel>(channel);
+          cleaned_channel.mutable_message()->clear_schema();
+          channel_offsets.emplace_back(
+              CopyFlatBuffer<Channel>(&cleaned_channel.message(), &fbb));
         }
       }
     }