message: it isn't initializable anymore and we can remove zepplin upgradeable
diff: @@ -4,7 +4,7 @@ pragma solidity 0.8.15;
  import { Semver } from "@eth-optimism/contracts-bedrock/contracts/universal/Semver.sol";
  import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
  -contract AttestationStation is Initializable, Semver {
  +contract AttestationStation is Semver {
  struct AttestationData {
  address about;
  bytes32 key;
  