diff --git a/src/env-inl.h b/src/env-inl.h
index 690e7970436e7b..7016e63d326dbd 100644
--- a/src/env-inl.h
+++ b/src/env-inl.h
@@ -49,14 +49,6 @@ inline uv_loop_t* IsolateData::event_loop() const {
   return event_loop_;
 }
 
-inline bool IsolateData::uses_node_allocator() const {
-  return uses_node_allocator_;
-}
-
-inline v8::ArrayBuffer::Allocator* IsolateData::allocator() const {
-  return allocator_;
-}
-
 inline NodeArrayBufferAllocator* IsolateData::node_allocator() const {
   return node_allocator_;
 }
diff --git a/src/env.cc b/src/env.cc
index 991ba3cf98d4a2..bfcee5a6a0f827 100644
--- a/src/env.cc
+++ b/src/env.cc
@@ -189,13 +189,9 @@ IsolateData::IsolateData(Isolate* isolate,
                          const std::vector<size_t>* indexes)
     : isolate_(isolate),
       event_loop_(event_loop),
-      allocator_(isolate->GetArrayBufferAllocator()),
       node_allocator_(node_allocator == nullptr ? nullptr
                                                 : node_allocator->GetImpl()),
-      uses_node_allocator_(allocator_ == node_allocator_),
       platform_(platform) {
-  CHECK_NOT_NULL(allocator_);
-
   options_.reset(
       new PerIsolateOptions(*(per_process::cli_options->per_isolate)));
 
@@ -222,9 +218,6 @@ void IsolateData::MemoryInfo(MemoryTracker* tracker) const {
   if (node_allocator_ != nullptr) {
     tracker->TrackFieldWithSize(
         "node_allocator", sizeof(*node_allocator_), "NodeArrayBufferAllocator");
-  } else {
-    tracker->TrackFieldWithSize(
-        "allocator", sizeof(*allocator_), "v8::ArrayBuffer::Allocator");
   }
   tracker->TrackFieldWithSize(
       "platform", sizeof(*platform_), "MultiIsolatePlatform");
diff --git a/src/env.h b/src/env.h
index 2add16c8eddaa7..eeb1ed165b3d14 100644
--- a/src/env.h
+++ b/src/env.h
@@ -551,8 +551,6 @@ class IsolateData : public MemoryRetainer {
   inline std::shared_ptr<PerIsolateOptions> options();
   inline void set_options(std::shared_ptr<PerIsolateOptions> options);
 
-  inline bool uses_node_allocator() const;
-  inline v8::ArrayBuffer::Allocator* allocator() const;
   inline NodeArrayBufferAllocator* node_allocator() const;
 
   inline worker::Worker* worker_context() const;
@@ -602,9 +600,7 @@ class IsolateData : public MemoryRetainer {
 
   v8::Isolate* const isolate_;
   uv_loop_t* const event_loop_;
-  v8::ArrayBuffer::Allocator* const allocator_;
   NodeArrayBufferAllocator* const node_allocator_;
-  const bool uses_node_allocator_;
   MultiIsolatePlatform* platform_;
   std::shared_ptr<PerIsolateOptions> options_;
   worker::Worker* worker_context_ = nullptr;