message: [secp256k1] remove unused byte array
  Summary: remove unused bytearray in verify
  Test Plan: re run tests
  Reviewers: O1 Bitcoin ABC, #bitcoin_abc, deadalnix
  Subscribers: schancel
diff: @@ -64,8 +64,6 @@ public class NativeSecp256k1 {
  byteBuff.put(signature);
  byteBuff.put(pub);
  - byte[][] retByteArray;
  -
  r.lock();
  try {
  return secp256k1_ecdsa_verify(byteBuff, Secp256k1Context.getContext(), signature.length, pub.length) == 1;
  