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/reference/workloads/RefStridedSliceWorkload.cpp b/src/backends/reference/workloads/RefStridedSliceWorkload.cpp
index 8bb1670..bfd3c28 100644
--- a/src/backends/reference/workloads/RefStridedSliceWorkload.cpp
+++ b/src/backends/reference/workloads/RefStridedSliceWorkload.cpp
@@ -28,7 +28,7 @@
     DataType outputDataType = outputInfo.GetDataType();
 
     BOOST_ASSERT(inputDataType == outputDataType);
-    boost::ignore_unused(outputDataType);
+    IgnoreUnused(outputDataType);
 
     StridedSlice(inputInfo,
                  m_Data.m_Parameters,