Remove placement index (#4416)

* remove placement index

* style

src/ngraph/node.cpp

@@ -341,16 +341,6 @@ void Node::set_placement(Placement placement)
     m_placement = placement;
 }
 
-size_t Node::get_placement_index() const
-{
-    return m_placement_index;
-}
-
-void Node::set_placement_index(size_t placement)
-{
-    m_placement_index = placement;
-}
-
 void Node::add_provenance_group_member(const shared_ptr<Node>& node)
 {
     m_provenance_group.insert(node);

src/ngraph/node.hpp

@@ -429,12 +429,6 @@ namespace ngraph
         /// Set device placement
         void set_placement(Placement placement);
 
-        /// Get device placement
-        size_t get_placement_index() const;
-
-        /// Set device placement
-        void set_placement_index(size_t placement);
-
         using RTMap = std::map<std::string, std::shared_ptr<Variant>>;
 
         RTMap& get_rt_info() { return m_rt_info; }
@@ -481,8 +475,6 @@ namespace ngraph
         virtual std::shared_ptr<Node> get_default_value() const { return nullptr; }
         /// Use instance ids for comparison instead of memory addresses to improve determinism
         bool operator<(const Node& other) const { return m_instance_id < other.m_instance_id; }
-        static const size_t placement_invalid = -1;
-
         /// \return A vector containing a handle for each of this node's inputs, in order.
         // TODO: Rename to get_inputs()?
         std::vector<Input<Node>> inputs();
@@ -548,7 +540,6 @@ namespace ngraph
         std::deque<descriptor::Output> m_outputs;
         std::unordered_map<Node*, autodiff::Adjoints> m_adjoint_map;
         Placement m_placement = Placement::DEFAULT;
-        size_t m_placement_index = placement_invalid;
         std::shared_ptr<ngraph::op::util::OpAnnotations> m_op_annotations;
         std::map<std::string, std::shared_ptr<Variant>> m_rt_info;
     };

src/ngraph/op/result.cpp

@@ -31,8 +31,6 @@ op::Result::Result(const Output<Node>& arg, bool needs_default_layout)
     , m_needs_default_layout(needs_default_layout)
 {
     constructor_validate_and_infer_types();
-    // always borrow the placement conf even the default one
-    set_placement_index(input_value(0).get_node()->get_placement_index());
 }
 
 bool ngraph::op::v0::Result::visit_attributes(AttributeVisitor& visitor)