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/commands/command_instance_unittest.cc b/src/commands/command_instance_unittest.cc
index cacb86c..1d32cd9 100644
--- a/src/commands/command_instance_unittest.cc
+++ b/src/commands/command_instance_unittest.cc
@@ -5,9 +5,9 @@
 #include "src/commands/command_instance.h"
 
 #include <gtest/gtest.h>
+#include <weave/test/unittest_utils.h>
 
 #include "src/commands/command_dictionary.h"
-#include "src/commands/unittest_utils.h"
 
 namespace weave {