refactor: remove lsp4TokenType parameter from initialize function

src/HypLSP7.sol

@@ -9,6 +9,9 @@ import { OwnableUpgradeable } from "@openzeppelin/contracts-upgradeable/access/O
 // libraries
 import { TokenMessageForLSP7 } from "./TokenMessageForLSP7.sol";
 
+// constants
+import { _LSP4_TOKEN_TYPE_TOKEN } from "@lukso/lsp4-contracts/contracts/LSP4Constants.sol";
+
 /**
  * @title LSP7 version of the Hyperlane ERC20 Token Router
  * @dev https://github.com/hyperlane-xyz/hyperlane-monorepo/blob/main/solidity/contracts/token/HypERC20.sol
@@ -25,15 +28,19 @@ contract HypLSP7 is LSP7DigitalAssetInitAbstract, TokenRouter {
      * @param _totalSupply The initial supply of the token.
      * @param _name The name of the token.
      * @param _symbol The symbol of the token.
+     *
+     * @dev The `LSP4TokenType` is hardcoded to type `Token` (= `0`) as all ERC20 tokens are of token type 0.
+     * This aims to keep the number of parameters consistent between hyperc20 and hypLSP7, so that the code of off-chain
+     * agents that call this function
+     * does not need to be modifed to add an extra parameter that would be irrelevant.
      */
     function initialize(
         uint256 _totalSupply,
         string memory _name,
         string memory _symbol,
         address _hook,
         address _interchainSecurityModule,
-        address _owner,
-        uint256 _lsp4TokenType
+        address _owner
     )
         external
         initializer
@@ -43,7 +50,7 @@ contract HypLSP7 is LSP7DigitalAssetInitAbstract, TokenRouter {
             name_: _name,
             symbol_: _symbol,
             newOwner_: _owner,
-            lsp4TokenType_: _lsp4TokenType,
+            lsp4TokenType_: _LSP4_TOKEN_TYPE_TOKEN,
             isNonDivisible_: false // isNonDivisible set to `false` as will not be used anyway since decimals() is
                 // overriden
          });