update withdraw methond

src/DegenDealer.sol

@@ -5,17 +5,10 @@
 
 pragma solidity ^0.8.19;
 
-import "./libraries/EIP712.sol";
 import "@openzeppelin/contracts/access/Ownable.sol";
-import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
 import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
 
 contract DegenDealer is Ownable {
-    struct WithdrawInfo {
-        address account;
-        uint256 amount;
-    }
-
     struct PositionInfo {
         address trader;
         int256 paperAmount;
@@ -25,10 +18,7 @@ contract DegenDealer is Ownable {
         string perp;
     }
 
-    bytes32 public immutable domainSeparator;
-    bytes32 public constant WITHDRAW_TYPEHASH = keccak256("Withdraw(address account,uint256 amount)");
     address public primaryAsset;
-    address public operator;
 
     using SafeERC20 for IERC20;
 
@@ -40,26 +30,16 @@ contract DegenDealer is Ownable {
 
     constructor(address _primaryAsset) {
         primaryAsset = _primaryAsset;
-        domainSeparator = EIP712._buildDomainSeparator("JOJODegen", "1", address(this));
     }
 
     function deposit(address account, uint256 amount) external {
         IERC20(primaryAsset).safeTransferFrom(msg.sender, address(this), amount);
         emit DegenDeposit(account, amount);
     }
 
-    function withdraw(WithdrawInfo memory withdrawInfo, bytes memory signature) external {
-        bytes32 hashStruct = keccak256(abi.encode(WITHDRAW_TYPEHASH, withdrawInfo.account, withdrawInfo.amount));
-        bytes32 withdrawHash = EIP712._hashTypedDataV4(domainSeparator, hashStruct);
-        (address recoverSigner,) = ECDSA.tryRecover(withdrawHash, signature);
-        require(recoverSigner == operator, "INVALID_ORDER_SIGNATURE");
-        require(withdrawInfo.account == msg.sender);
-        IERC20(primaryAsset).safeTransfer(msg.sender, withdrawInfo.amount);
-        emit DegenWithdraw(msg.sender, withdrawInfo.amount);
-    }
-
-    function updateGlobalOperator(address newOperator) public onlyOwner {
-        operator = newOperator;
+    function withdraw(address account, uint256 amount) external onlyOwner {
+        IERC20(primaryAsset).safeTransfer(account, amount);
+        emit DegenWithdraw(account, amount);
     }
 
     function batchUpdatePosition(PositionInfo[] memory positionDatas) public onlyOwner {