Remove unnecessary 'using' directive am: 928facdec9 am: 82a39a0d83
am: 61dab9abea

Change-Id: I495001ca59d5e1ff619650f4d399534e24ac90a4
diff --git a/gatekeeper_messages.cpp b/gatekeeper_messages.cpp
index 41972bb..d6d028d 100644
--- a/gatekeeper_messages.cpp
+++ b/gatekeeper_messages.cpp
@@ -19,8 +19,6 @@
 
 #include <string.h>
 
-using namespace std;
-
 namespace gatekeeper {
 
 /**