Revert of [ignition/turbo] Perform liveness analysis on the bytecodes

src/compiler/bytecode-liveness-map.h

Index: src/compiler/bytecode-liveness-map.h
diff --git a/src/compiler/bytecode-liveness-map.h b/src/compiler/bytecode-liveness-map.h
deleted file mode 100644
index e5c7a38996539d388d062f73caf890d085159cb2..0000000000000000000000000000000000000000
--- a/src/compiler/bytecode-liveness-map.h
+++ /dev/null
@@ -1,55 +0,0 @@
-// Copyright 2016 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef V8_COMPILER_BYTECODE_LIVENESS_MAP_H_
-#define V8_COMPILER_BYTECODE_LIVENESS_MAP_H_
-
-#include "src/base/hashmap.h"
-#include "src/bit-vector.h"
-#include "src/zone/zone.h"
-
-namespace v8 {
-namespace internal {
-
-class Zone;
-
-namespace compiler {
-
-struct Liveness {
-  BitVector* in;
-  BitVector* out;
-
-  Liveness(int size, Zone* zone);
-};
-
-class V8_EXPORT_PRIVATE BytecodeLivenessMap {
- public:
-  BytecodeLivenessMap(int size, Zone* zone);
-
-  Liveness& InitializeLiveness(int offset, int size, Zone* zone);
-
-  Liveness& GetLiveness(int offset);
-  const Liveness& GetLiveness(int offset) const;
-
-  BitVector* GetInLiveness(int offset) { return GetLiveness(offset).in; }
-  const BitVector* GetInLiveness(int offset) const {
-    return GetLiveness(offset).in;
-  }
-
-  BitVector* GetOutLiveness(int offset) { return GetLiveness(offset).out; }
-  const BitVector* GetOutLiveness(int offset) const {
-    return GetLiveness(offset).out;
-  }
-
- private:
-  base::TemplateHashMapImpl<int, Liveness, base::KeyEqualityMatcher<int>,
-                            ZoneAllocationPolicy>
-      liveness_map_;
-};
-
-}  // namespace compiler
-}  // namespace internal
-}  // namespace v8
-
-#endif  // V8_COMPILER_BYTECODE_LIVENESS_MAP_H_