Remove dupe FastHypERC20 for verifiable contracts (#3091)

### Description

Duplicate FastHypERC20 implementations got into main following the v3
merge that prevent flattening used in verification

### Related issues

- Unblocks https://github.com/hyperlane-xyz/issues/issues/886

### Backward compatibility

Yes

### Testing

Unit Tests

.github/workflows/storage-analysis.yml

@@ -55,6 +55,7 @@ jobs:
 
       # Compare outputs
       - name: Compare outputs
+        continue-on-error: true # diff exits with 1 if files differ
         run: diff --unified solidity/base-storage solidity/HEAD-storage > layout.diff
 
       - name: Comment PR with layout diff

solidity/contracts/token/FastHypERC20.sol

@@ -1,62 +0,0 @@
-// SPDX-License-Identifier: Apache-2.0
-pragma solidity >=0.8.0;
-
-import {HypERC20} from "./HypERC20.sol";
-
-import {TokenRouter} from "./libs/TokenRouter.sol";
-import {FastTokenRouter} from "./libs/FastTokenRouter.sol";
-import {TokenMessage} from "./libs/TokenMessage.sol";
-
-import {ERC20Upgradeable} from "@openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol";
-
-/**
- * @title Hyperlane ERC20 Token Router that extends ERC20 with remote transfer functionality.
- * @author Abacus Works
- * @dev Supply on each chain is not constant but the aggregate supply across all chains is.
- */
-contract FastHypERC20 is FastTokenRouter, HypERC20 {
-    constructor(
-        uint8 __decimals,
-        address _mailbox
-    ) HypERC20(__decimals, _mailbox) {}
-
-    /**
-     * @dev delegates transfer logic to `_transferTo`.
-     * @inheritdoc TokenRouter
-     */
-    function _handle(
-        uint32 _origin,
-        bytes32 _sender,
-        bytes calldata _message
-    ) internal virtual override(FastTokenRouter, TokenRouter) {
-        FastTokenRouter._handle(_origin, _sender, _message);
-    }
-
-    /**
-     * @dev Mints `_amount` of tokens to `_recipient`.
-     * @inheritdoc FastTokenRouter
-     */
-    function _fastTransferTo(
-        address _recipient,
-        uint256 _amount
-    ) internal override {
-        _mint(_recipient, _amount);
-    }
-
-    /**
-     * @dev Burns `_amount` of tokens from `_recipient`.
-     * @inheritdoc FastTokenRouter
-     */
-    function _fastRecieveFrom(
-        address _sender,
-        uint256 _amount
-    ) internal override {
-        _burn(_sender, _amount);
-    }
-
-    function balanceOf(
-        address _account
-    ) public view virtual override(TokenRouter, HypERC20) returns (uint256) {
-        return HypERC20.balanceOf(_account);
-    }
-}

solidity/contracts/token/FastHypERC20Collateral.sol

@@ -1,61 +0,0 @@
-// SPDX-License-Identifier: Apache-2.0
-pragma solidity >=0.8.0;
-
-import {HypERC20Collateral} from "./HypERC20Collateral.sol";
-import {TokenRouter} from "./libs/TokenRouter.sol";
-import {FastTokenRouter} from "./libs/FastTokenRouter.sol";
-
-import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
-import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
-
-/**
- * @title Hyperlane ERC20 Token Collateral that wraps an existing ERC20 with remote transfer functionality.
- * @author Abacus Works
- */
-contract FastHypERC20Collateral is FastTokenRouter, HypERC20Collateral {
-    using SafeERC20 for IERC20;
-
-    /**
-     * @notice Constructor
-     * @param erc20 Address of the token to keep as collateral
-     * @param _mailbox Address of the mailbox address
-     */
-    constructor(
-        address erc20,
-        address _mailbox
-    ) HypERC20Collateral(erc20, _mailbox) {}
-
-    /**
-     * @dev delegates transfer logic to `_transferTo`.
-     * @inheritdoc FastTokenRouter
-     */
-    function _handle(
-        uint32 _origin,
-        bytes32 _sender,
-        bytes calldata _message
-    ) internal virtual override(FastTokenRouter, TokenRouter) {
-        FastTokenRouter._handle(_origin, _sender, _message);
-    }
-
-    /**
-     * @dev Transfers `_amount` of `wrappedToken` to `_recipient`.
-     * @inheritdoc FastTokenRouter
-     */
-    function _fastTransferTo(
-        address _recipient,
-        uint256 _amount
-    ) internal override {
-        wrappedToken.safeTransfer(_recipient, _amount);
-    }
-
-    /**
-     * @dev Transfers in `_amount` of `wrappedToken` from `_recipient`.
-     * @inheritdoc FastTokenRouter
-     */
-    function _fastRecieveFrom(
-        address _sender,
-        uint256 _amount
-    ) internal override {
-        wrappedToken.safeTransferFrom(_sender, address(this), _amount);
-    }
-}

typescript/infra/config/environments/mainnet3/warp/verification.json

@@ -1,11 +1,5 @@
 {
   "arbitrum": [
-    {
-      "name": "HypERC20",
-      "address": "0x93ca0d85837FF83158Cd14D65B169CdB223b1921",
-      "constructorArguments": "0000000000000000000000000000000000000000000000000000000000000006000000000000000000000000979ca5202784112f4738403dbec5d0f3b9daabb9",
-      "isProxy": false
-    },
     {
       "name": "HypERC20",
       "address": "0x93ca0d85837FF83158Cd14D65B169CdB223b1921",