chore: remove old todo comment (#3615)

We already switched to openzeppelin contracts.

Author: sveitser

contracts/src/EspToken.sol

@@ -2,7 +2,6 @@
 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.0;
 
-// TODO MA: should we really use solmate, or just stick with openzeppelin?
 import { ERC20Upgradeable } from
     "@openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol";
 import { OwnableUpgradeable } from