IVGCVSW-4482 Remove boost::ignore_unused

!referencetests:229377

Signed-off-by: Jan Eilers <jan.eilers@arm.com>
Change-Id: Ia9b360b4a057fe7bbce5b268092627c09a0dba82
diff --git a/tests/InferenceTestImage.cpp b/tests/InferenceTestImage.cpp
index 92c67ae..83c5cce 100644
--- a/tests/InferenceTestImage.cpp
+++ b/tests/InferenceTestImage.cpp
@@ -4,9 +4,9 @@
 //
 #include "InferenceTestImage.hpp"
 
-#include <boost/core/ignore_unused.hpp>
+#include <armnn/utility/IgnoreUnused.hpp>
+
 #include <boost/format.hpp>
-#include <boost/core/ignore_unused.hpp>
 #include <boost/numeric/conversion/cast.hpp>
 
 #include <array>
@@ -314,7 +314,7 @@
     return GetImageDataInArmNnLayoutAsFloats(layout, image,
         [](ImageChannel channel, float value)
         {
-            boost::ignore_unused(channel);
+            armnn::IgnoreUnused(channel);
             return value / 255.f;
         });
 }