Removed Common

Change-Id: I01ea8f07220375c2ad9bc0092281d4f27c642303
diff --git a/aos/once.h b/aos/once.h
index f6954f6..d7eb0d3 100644
--- a/aos/once.h
+++ b/aos/once.h
@@ -3,7 +3,7 @@
 
 #include <stdint.h>
 
-#include "aos/common/gtest_prod.h"
+#include "aos/gtest_prod.h"
 
 namespace aos {
 namespace testing {