diff --git a/src/crypto/crypto_util.h b/src/crypto/crypto_util.h
index 7a795fe5e81f94..07ea8e44da3e54 100644
--- a/src/crypto/crypto_util.h
+++ b/src/crypto/crypto_util.h
@@ -752,20 +752,6 @@ class ArrayBufferOrViewContents {
   std::shared_ptr<v8::BackingStore> store_;
 };
 
-template <typename T>
-std::vector<T> CopyBuffer(const ArrayBufferOrViewContents<T>& buf) {
-  std::vector<T> vec;
-  vec->resize(buf.size());
-  if (vec->size() > 0 && buf.data() != nullptr)
-    memcpy(vec->data(), buf.data(), vec->size());
-  return vec;
-}
-
-template <typename T>
-std::vector<T> CopyBuffer(v8::Local<v8::Value> buf) {
-  return CopyBuffer(ArrayBufferOrViewContents<T>(buf));
-}
-
 v8::MaybeLocal<v8::Value> EncodeBignum(
     Environment* env,
     const BIGNUM* bn,