diff --git a/src/crypto/crypto.h b/src/crypto/crypto.h
index 9252017823e..01def5dea7d 100644
--- a/src/crypto/crypto.h
+++ b/src/crypto/crypto.h
@@ -71,22 +71,6 @@ namespace crypto {
 
   using secret_key = epee::mlocked<tools::scrubbed<ec_scalar>>;
 
-  POD_CLASS public_keyV {
-    std::vector<public_key> keys;
-    int rows;
-  };
-
-  POD_CLASS secret_keyV {
-    std::vector<secret_key> keys;
-    int rows;
-  };
-
-  POD_CLASS public_keyM {
-    int cols;
-    int rows;
-    std::vector<secret_keyV> column_vectors;
-  };
-
   POD_CLASS key_derivation: ec_point {
     friend class crypto_ops;
   };