feat(ctb): Remove MCP from OptimismMintableERC20Factory

packages/contracts-bedrock/src/universal/OptimismMintableERC20Factory.sol

@@ -2,9 +2,7 @@
 pragma solidity 0.8.15;
 
 import { OptimismMintableERC20 } from "src/universal/OptimismMintableERC20.sol";
-import { Initializable } from "@openzeppelin/contracts/proxy/utils/Initializable.sol";
 import { ISemver } from "src/universal/ISemver.sol";
-import { Constants } from "src/libraries/Constants.sol";
 
 /// @custom:proxied
 /// @custom:predeployed 0x4200000000000000000000000000000000000012
@@ -13,10 +11,9 @@ import { Constants } from "src/libraries/Constants.sol";
 ///         contracts on the network it's deployed to. Simplifies the deployment process for users
 ///         who may be less familiar with deploying smart contracts. Designed to be backwards
 ///         compatible with the older StandardL2ERC20Factory contract.
-contract OptimismMintableERC20Factory is ISemver, Initializable {
+contract OptimismMintableERC20Factory is ISemver {
     /// @notice Address of the StandardBridge on this chain.
-    /// @custom:network-specific
-    address public bridge;
+    address public immutable BRIDGE;
 
     /// @custom:legacy
     /// @notice Emitted whenever a new OptimismMintableERC20 is created. Legacy version of the newer
@@ -31,28 +28,16 @@ contract OptimismMintableERC20Factory is ISemver, Initializable {
     /// @param deployer    Address of the account that deployed the token.
     event OptimismMintableERC20Created(address indexed localToken, address indexed remoteToken, address deployer);
 
-    /// @notice Semantic version.
-    /// @custom:semver 1.7.0
-    string public constant version = "1.7.0";
-
     /// @notice The semver MUST be bumped any time that there is a change in
     ///         the OptimismMintableERC20 token contract since this contract
     ///         is responsible for deploying OptimismMintableERC20 contracts.
-    constructor() {
-        initialize({ _bridge: address(0) });
-    }
+    /// @notice Semantic version.
+    /// @custom:semver 1.8.0
+    string public constant version = "1.8.0";
 
-    /// @notice Initializer.
     /// @param _bridge Address of the StandardBridge on this chain.
-    function initialize(address _bridge) public reinitializer(Constants.INITIALIZER) {
-        bridge = _bridge;
-    }
-
-    /// @notice Returns the address of the StandardBridge on this chain.
-    ///         This is a legacy getter, use `bridge` instead.
-    /// @custom:legacy
-    function BRIDGE() external view returns (address) {
-        return bridge;
+    constructor(address _bridge) {
+        BRIDGE = _bridge;
     }
 
     /// @custom:legacy