Drop unused variable in rlz_value_store_chromeos.cc.

rlz/chromeos/lib/rlz_value_store_chromeos.cc

Index: rlz/chromeos/lib/rlz_value_store_chromeos.cc
diff --git a/rlz/chromeos/lib/rlz_value_store_chromeos.cc b/rlz/chromeos/lib/rlz_value_store_chromeos.cc
index ad1407a40ebb6a1e9f2b9cbf1c474eccaa98d5f4..a6368632426b49e6d54137306d221229e8af5778 100644
--- a/rlz/chromeos/lib/rlz_value_store_chromeos.cc
+++ b/rlz/chromeos/lib/rlz_value_store_chromeos.cc
@@ -20,10 +20,6 @@ namespace rlz_lib {
 
 namespace {
 
-// Product names.
-const char kProductChrome[] = "chrome";
-const char kProductOther[] = "other";
-
 // Key names.
 const char kPingTimeKey[] = "ping_time";
 const char kAccessPointKey[] = "access_points";