Remove unnecessary `Address` library import in `SignatureChecker` (#3731)

contracts/utils/cryptography/SignatureChecker.sol

@@ -4,7 +4,6 @@
 pragma solidity ^0.8.0;
 
 import "./ECDSA.sol";
-import "../Address.sol";
 import "../../interfaces/IERC1271.sol";
 
 /**