shrink config for webproxy

Change-Id: Ib9b9502044426faf1790496900fdf7dc24d8c98e
diff --git a/aos/network/web_proxy_main.cc b/aos/network/web_proxy_main.cc
index 7ea3ff4..0e49760 100644
--- a/aos/network/web_proxy_main.cc
+++ b/aos/network/web_proxy_main.cc
@@ -1,4 +1,5 @@
 #include "aos/events/shm_event_loop.h"
+#include "aos/flatbuffer_merge.h"
 #include "aos/init.h"
 #include "aos/network/web_proxy.h"
 #include "aos/seasocks/seasocks_logger.h"
@@ -62,6 +63,14 @@
   aos::FlatbufferDetachedBuffer<aos::Configuration> config =
       aos::configuration::ReadConfig(FLAGS_config);
 
+  for (size_t i = 0; i < config.message().channels()->size(); ++i) {
+    aos::Channel *channel =
+        config.mutable_message()->mutable_channels()->GetMutableObject(i);
+    channel->clear_schema();
+  }
+
+  config = aos::CopyFlatBuffer(&config.message());
+
   std::vector<std::unique_ptr<aos::web_proxy::Subscriber>> subscribers;
 
   std::thread data_thread{