Remove (NE/CL)YoloLayer support

YOLO layer is too specialized and specific to a single model type. Can
be decomposed using split, activation and concatenate layers

Partially Resolves: COMPMID-3996

Signed-off-by: Georgios Pinitas <georgios.pinitas@arm.com>
Change-Id: I3cde88f8d4cc7d8c70ce1bb3b32b00f8d09bdca2
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/4678
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>
diff --git a/src/graph/backends/NEON/NENodeValidator.cpp b/src/graph/backends/NEON/NENodeValidator.cpp
index a9e5a86..9fa61bc 100644
--- a/src/graph/backends/NEON/NENodeValidator.cpp
+++ b/src/graph/backends/NEON/NENodeValidator.cpp
@@ -122,13 +122,11 @@
         case NodeType::ROIAlignLayer:
             return ARM_COMPUTE_CREATE_ERROR(arm_compute::ErrorCode::RUNTIME_ERROR, "Unsupported operation : ROIAlignLayer");
         case NodeType::SliceLayer:
-            return ARM_COMPUTE_CREATE_ERROR(arm_compute::ErrorCode::RUNTIME_ERROR, "Unsupported operation : SliceLayer");
+            return detail::validate_slice_layer<NESlice>(*polymorphic_downcast<SliceLayerNode *>(node));
         case NodeType::StridedSliceLayer:
             return detail::validate_strided_slice_layer<NEStridedSlice>(*polymorphic_downcast<StridedSliceLayerNode *>(node));
         case NodeType::UpsampleLayer:
             return detail::validate_upsample_layer<NEUpsampleLayer>(*polymorphic_downcast<UpsampleLayerNode *>(node));
-        case NodeType::YOLOLayer:
-            return detail::validate_yolo_layer<NEYOLOLayer>(*polymorphic_downcast<YOLOLayerNode *>(node));
         case NodeType::EltwiseLayer:
             return detail::validate_eltwise_Layer<NEEltwiseLayerFunctions>(*polymorphic_downcast<EltwiseLayerNode *>(node));
         case NodeType::UnaryEltwiseLayer: