metricsd: Remove unused type declarations

BUG: 26092352
Change-Id: If0dda4c171a2b62291693db49c1e16499fc10f5a
diff --git a/metricsd/metrics_collector.cc b/metricsd/metrics_collector.cc
index 28f9ad3..f3871e4 100644
--- a/metricsd/metrics_collector.cc
+++ b/metricsd/metrics_collector.cc
@@ -40,8 +40,6 @@
 using base::TimeDelta;
 using base::TimeTicks;
 using chromeos_metrics::PersistentInteger;
-using com::android::Weave::CommandProxy;
-using com::android::Weave::ManagerProxy;
 using std::map;
 using std::string;
 using std::vector;