Remove unused constants

Change-Id: I0352f364d492d86d482badca7e277c015024458b
Reviewed-on: https://weave-review.googlesource.com/2729
Reviewed-by: Alex Vakulenko <avakulenko@google.com>

src/privet/privet_handler.cc

diff --git a/src/privet/privet_handler.cc b/src/privet/privet_handler.cc
index 8bfe753..83d5ef3 100644
--- a/src/privet/privet_handler.cc
+++ b/src/privet/privet_handler.cc
@@ -114,8 +114,6 @@
 std::string xmpp_endpoint;
 
 const char kFingerprintKey[] = "fingerprint";
-const char kStateKey[] = "state";
-const char kCommandsKey[] = "commands";
 const char kTraitsKey[] = "traits";
 const char kComponentsKey[] = "components";
 const char kCommandsIdKey[] = "id";