COMPMID-2432: Fix defects reported by Coverity

Change-Id: I3db7bfffb8da95ca0b6fb0c13fef810756270b49
Signed-off-by: Michalis Spyrou <michalis.spyrou@arm.com>
Reviewed-on: https://review.mlplatform.org/c/1490
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
diff --git a/src/core/CL/kernels/CLPixelWiseMultiplicationKernel.cpp b/src/core/CL/kernels/CLPixelWiseMultiplicationKernel.cpp
index 5b00fd1..76403d1 100644
--- a/src/core/CL/kernels/CLPixelWiseMultiplicationKernel.cpp
+++ b/src/core/CL/kernels/CLPixelWiseMultiplicationKernel.cpp
@@ -276,8 +276,8 @@
         add_3D_tensor_argument(idx, _output, slice);
         enqueue(queue, *this, slice);
 
-        collapsed.slide_window_slice_3D(slice_input1);
-        collapsed.slide_window_slice_3D(slice_input2);
+        ARM_COMPUTE_UNUSED(collapsed.slide_window_slice_3D(slice_input1));
+        ARM_COMPUTE_UNUSED(collapsed.slide_window_slice_3D(slice_input2));
     }
     while(collapsed.slide_window_slice_3D(slice));
 }
@@ -411,8 +411,8 @@
         add_3D_tensor_argument(idx, _output, slice);
         enqueue(queue, *this, slice);
 
-        collapsed.slide_window_slice_3D(slice_input1);
-        collapsed.slide_window_slice_3D(slice_input2);
+        ARM_COMPUTE_UNUSED(collapsed.slide_window_slice_3D(slice_input1));
+        ARM_COMPUTE_UNUSED(collapsed.slide_window_slice_3D(slice_input2));
     }
     while(collapsed.slide_window_slice_3D(slice));
 }