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/backendsCommon/LayerSupportBase.cpp b/src/backends/backendsCommon/LayerSupportBase.cpp
index 1279134..e8ef46e 100644
--- a/src/backends/backendsCommon/LayerSupportBase.cpp
+++ b/src/backends/backendsCommon/LayerSupportBase.cpp
@@ -10,7 +10,7 @@
 
 #include <backendsCommon/LayerSupportBase.hpp>
 
-#include <boost/core/ignore_unused.hpp>
+#include <armnn/utility/IgnoreUnused.hpp>
 
 namespace
 {