refactor: remove superchain erc20 modifier (#12566)

* fix: remove superchain erc20 modifier (#111)

* fix: remove superchain erc20 modifier

---------
Co-authored-by: Disco <131301107+0xDiscotech@users.noreply.github.com>
Co-authored-by: 0xng <ng@defi.sucks>
Co-authored-by: 0xParticle <particle@defi.sucks>
Co-authored-by: gotzenx <78360669+gotzenx@users.noreply.github.com>

* fix: pre pr

---------
Co-authored-by: Disco <131301107+0xDiscotech@users.noreply.github.com>
Co-authored-by: 0xng <ng@defi.sucks>
Co-authored-by: 0xParticle <particle@defi.sucks>
Co-authored-by: gotzenx <78360669+gotzenx@users.noreply.github.com>

packages/contracts-bedrock/semver-lock.json

@@ -125,7 +125,7 @@
   },
   "src/L2/SuperchainERC20.sol": {
     "initCodeHash": "0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470",
-    "sourceCodeHash": "0x6a384ccfb6f2f7316c1b33873a1630b5179e52475951d31771656e06d2b11519"
+    "sourceCodeHash": "0x45b9afdc9e52c27f192673388868a803f54d8f0bffe9defd81d584642e282b6b"
   },
   "src/L2/SuperchainTokenBridge.sol": {
     "initCodeHash": "0xef7590c30630a75f105384e339e52758569c25a5aa0a5934c521e004b8f86220",

packages/contracts-bedrock/src/L2/SuperchainERC20.sol

@@ -12,22 +12,18 @@ import { Unauthorized } from "src/libraries/errors/CommonErrors.sol";
 ///         bridging to make it fungible across the Superchain. This construction allows the SuperchainTokenBridge to
 ///         burn and mint tokens.
 abstract contract SuperchainERC20 is ERC20, ICrosschainERC20, ISemver {
-    /// @notice A modifier that only allows the SuperchainTokenBridge to call
-    modifier onlySuperchainTokenBridge() {
-        if (msg.sender != Predeploys.SUPERCHAIN_TOKEN_BRIDGE) revert Unauthorized();
-        _;
-    }
-
     /// @notice Semantic version.
-    /// @custom:semver 1.0.0-beta.2
+    /// @custom:semver 1.0.0-beta.3
     function version() external view virtual returns (string memory) {
-        return "1.0.0-beta.2";
+        return "1.0.0-beta.3";
     }
 
     /// @notice Allows the SuperchainTokenBridge to mint tokens.
     /// @param _to     Address to mint tokens to.
     /// @param _amount Amount of tokens to mint.
-    function crosschainMint(address _to, uint256 _amount) external onlySuperchainTokenBridge {
+    function crosschainMint(address _to, uint256 _amount) external {
+        if (msg.sender != Predeploys.SUPERCHAIN_TOKEN_BRIDGE) revert Unauthorized();
+
         _mint(_to, _amount);
 
         emit CrosschainMinted(_to, _amount);
@@ -36,7 +32,9 @@ abstract contract SuperchainERC20 is ERC20, ICrosschainERC20, ISemver {
     /// @notice Allows the SuperchainTokenBridge to burn tokens.
     /// @param _from   Address to burn tokens from.
     /// @param _amount Amount of tokens to burn.
-    function crosschainBurn(address _from, uint256 _amount) external onlySuperchainTokenBridge {
+    function crosschainBurn(address _from, uint256 _amount) external {
+        if (msg.sender != Predeploys.SUPERCHAIN_TOKEN_BRIDGE) revert Unauthorized();
+
         _burn(_from, _amount);
 
         emit CrosschainBurnt(_from, _amount);