Remove object schema type system

Since libweave no longer semantically parses command/state definitions
and validates commands and states, there is no need for this extra
code.

BUG: 25841230
Change-Id: I53dfab20db8c97b621c07fe234a7b3c6da7325bb
Reviewed-on: https://weave-review.googlesource.com/1660
Reviewed-by: Vitaly Buka <vitalybuka@google.com>
diff --git a/src/states/state_change_queue.cc b/src/states/state_change_queue.cc
index 87cc18d..ba7bf65 100644
--- a/src/states/state_change_queue.cc
+++ b/src/states/state_change_queue.cc
@@ -5,6 +5,7 @@
 #include "src/states/state_change_queue.h"
 
 #include <base/logging.h>
+#include <base/values.h>
 
 namespace weave {