src: remove KeyObjectData::CreateSecret overload

This function is unused and there is not much potential for using
it in the current codebase.

Author: tniessen

src/crypto/crypto_keys.cc

@@ -837,11 +837,6 @@ void KeyObjectData::MemoryInfo(MemoryTracker* tracker) const {
   }
 }
 
-std::shared_ptr<KeyObjectData> KeyObjectData::CreateSecret(
-    const ArrayBufferOrViewContents<char>& buf) {
-  return CreateSecret(buf.ToCopy());
-}
-
 std::shared_ptr<KeyObjectData> KeyObjectData::CreateSecret(ByteSource key) {
   CHECK(key);
   return std::shared_ptr<KeyObjectData>(new KeyObjectData(std::move(key)));

src/crypto/crypto_keys.h

@@ -134,9 +134,6 @@ class ManagedEVPPKey : public MemoryRetainer {
 // Objects of this class can safely be shared among threads.
 class KeyObjectData : public MemoryRetainer {
  public:
-  static std::shared_ptr<KeyObjectData> CreateSecret(
-      const ArrayBufferOrViewContents<char>& buf);
-
   static std::shared_ptr<KeyObjectData> CreateSecret(ByteSource key);
 
   static std::shared_ptr<KeyObjectData> CreateAsymmetric(