IVGCVSW-4482 Remove boost::ignore_unused

!referencetests:229377

Signed-off-by: Jan Eilers <jan.eilers@arm.com>
Change-Id: Ia9b360b4a057fe7bbce5b268092627c09a0dba82
diff --git a/src/backends/cl/test/Fp16SupportTest.cpp b/src/backends/cl/test/Fp16SupportTest.cpp
index ee5163f6..b7d274f 100644
--- a/src/backends/cl/test/Fp16SupportTest.cpp
+++ b/src/backends/cl/test/Fp16SupportTest.cpp
@@ -11,8 +11,8 @@
 #include <Graph.hpp>
 #include <Optimizer.hpp>
 #include <backendsCommon/CpuTensorHandle.hpp>
+#include <armnn/utility/IgnoreUnused.hpp>
 
-#include <boost/core/ignore_unused.hpp>
 #include <boost/test/unit_test.hpp>
 
 #include <set>