CPU: Remove 'Instruction' and remaining references to it

The notion of an instruction will probably come back
but with a different implementation.

src/ngraph/runtime/cpu/call_frame.cpp

@@ -15,7 +15,6 @@
 #include <algorithm>
 
 #include "ngraph/runtime/cpu/call_frame.hpp"
-#include "ngraph/runtime/cpu/instruction.hpp"
 
 using namespace std;
 using namespace ngraph::runtime::cpu;

src/ngraph/runtime/cpu/call_frame.hpp

@@ -30,7 +30,6 @@ namespace ngraph
 
         namespace cpu
         {
-            class Instruction;
             class CallFrame;
             using EntryPoint = std::function<void(ngraph::runtime::cpu::CallFrame*, ngraph::runtime::TensorViewPtrs&)>;
 

src/ngraph/runtime/cpu/external_function.cpp

@@ -87,7 +87,6 @@ static const OpMap dispatcher{{TI(ngraph::op::Add), &Emitter::EmitAdd},
 ExternalFunction::ExternalFunction(const std::shared_ptr<ngraph::Function>& function,
                                    bool release_function)
     : ngraph::runtime::ExternalFunction(function, release_function)
-    , m_instructions(make_shared<std::vector<std::shared_ptr<Instruction>>>())
     , compiled_function(nullptr)
 {
 }

src/ngraph/runtime/cpu/external_function.hpp

@@ -31,7 +31,6 @@ namespace ngraph
     {
         namespace cpu
         {
-            class Instruction;
             class ExternalFunction;
             class Emitter;
             class CallFrame;
@@ -61,7 +60,6 @@ namespace ngraph
 
                 size_t m_n_inputs;
                 size_t m_n_outputs;
-                std::shared_ptr<std::vector<std::shared_ptr<Instruction>>> m_instructions;
                 ngraph::descriptor::TensorViewPtrs m_temp_views;
                 EntryPoint compiled_function;
             };

src/ngraph/runtime/cpu/instruction.hpp

-// ----------------------------------------------------------------------------
-// Copyright 2017 Nervana Systems Inc.
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// ----------------------------------------------------------------------------
-
-#pragma once
-
-#include <memory>
-
-namespace ngraph
-{
-    namespace runtime
-    {
-        namespace cpu
-        {
-            class CallFrame;
-
-            /// @brief An interpreter for an Op
-            ///
-            /// The call_frame has a vector of instructions and calls execute on each instruction, passing it the call_frame.
-            /// Instructions get argument, result, and intermediate tensor views from the call frame. Instructions may also
-            /// set a flag in the call_frame to end execution, or adjust execution by modifying the position in the instruction vector.
-            class Instruction
-            {
-            public:
-                virtual ~Instruction() {}
-                virtual void execute(CallFrame& call_frame) const = 0;
-            };
-        }
-    }
-}