Remove unused private functions from Encryptor

crypto/encryptor.h

Index: crypto/encryptor.h
diff --git a/crypto/encryptor.h b/crypto/encryptor.h
index 4b6745ef0fd278535213867f23385d56f9c6ed98..c94a730914d216be887883509b92e6a5c20c2a5d 100644
--- a/crypto/encryptor.h
+++ b/crypto/encryptor.h
@@ -84,29 +84,6 @@ class CRYPTO_EXPORT Encryptor {
   // TODO(albertb): Support streaming encryption.
 
  private:
-  // Generates a mask using |counter_| to be used for encryption in CTR mode.
-  // Resulting mask will be written to |mask| with |mask_len| bytes.
-  //
-  // Make sure there's enough space in mask when calling this method.
-  // Reserve at least |plaintext_len| + 16 bytes for |mask|.
-  //
-  // The generated mask will always have at least |plaintext_len| bytes and
-  // will be a multiple of the counter length.
-  //
-  // This method is used only in CTR mode.
-  //
-  // Returns false if this call failed.
-  bool GenerateCounterMask(size_t plaintext_len,
-                           uint8_t* mask,
-                           size_t* mask_len);
-
-  // Mask the |plaintext| message using |mask|. The output will be written to
-  // |ciphertext|. |ciphertext| must have at least |plaintext_len| bytes.
-  void MaskMessage(const void* plaintext,
-                   size_t plaintext_len,
-                   const void* mask,
-                   void* ciphertext) const;
-
   SymmetricKey* key_;
   Mode mode_;
   std::unique_ptr<Counter> counter_;