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/CLComparisonKernel.cpp b/src/core/CL/kernels/CLComparisonKernel.cpp
index 628f9f1..5570ecf 100644
--- a/src/core/CL/kernels/CLComparisonKernel.cpp
+++ b/src/core/CL/kernels/CLComparisonKernel.cpp
@@ -210,8 +210,8 @@
 
         enqueue(queue, *this, slice, lws_hint());
 
-        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));
 }
diff --git a/src/core/CL/kernels/CLElementwiseOperationKernel.cpp b/src/core/CL/kernels/CLElementwiseOperationKernel.cpp
index 4c191de..a69e84a 100644
--- a/src/core/CL/kernels/CLElementwiseOperationKernel.cpp
+++ b/src/core/CL/kernels/CLElementwiseOperationKernel.cpp
@@ -300,8 +300,8 @@
 
         enqueue(queue, *this, slice, lws_hint());
 
-        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));
 }
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));
 }
diff --git a/src/core/CL/kernels/CLWeightsReshapeKernel.cpp b/src/core/CL/kernels/CLWeightsReshapeKernel.cpp
index 7639a48..590af4d 100644
--- a/src/core/CL/kernels/CLWeightsReshapeKernel.cpp
+++ b/src/core/CL/kernels/CLWeightsReshapeKernel.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2018 ARM Limited.
+ * Copyright (c) 2017-2019 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -152,7 +152,7 @@
         if(_biases != nullptr)
         {
             add_1D_tensor_argument(idx, _biases, biases_slice);
-            biases_window.slide_window_slice_1D(biases_slice);
+            ARM_COMPUTE_UNUSED(biases_window.slide_window_slice_1D(biases_slice));
         }
 
         // Run kernel