removed unused include

Signed-off-by: Krzysztof Grobelny <krzysztof.grobelny@intel.com>
Change-Id: I1cd4601a327c17f1bb5ada5b82600e1c886364f9
diff --git a/tests/src/test_labeled_tuple.cpp b/tests/src/test_labeled_tuple.cpp
index 85f2edb..dec9cd0 100644
--- a/tests/src/test_labeled_tuple.cpp
+++ b/tests/src/test_labeled_tuple.cpp
@@ -1,7 +1,6 @@
 #include "helpers.hpp"
 #include "utils/labeled_tuple.hpp"
 
-#include <iostream>
 #include <limits>
 
 #include <gmock/gmock.h>