Remove redundant ABIEncoderV2 pragma (#539)

Author: Neuti Yoo

contracts/Bridge.sol

@@ -1,6 +1,5 @@
 // SPDX-License-Identifier: LGPL-3.0-only
 pragma solidity 0.8.11;
-pragma experimental ABIEncoderV2;
 
 import "./utils/AccessControl.sol";
 import "./utils/Pausable.sol";

contracts/CentrifugeAsset.sol

@@ -1,6 +1,5 @@
 // SPDX-License-Identifier: LGPL-3.0-only
 pragma solidity 0.8.11;
-pragma experimental ABIEncoderV2;
 
 /**
     @title Represents a bridged Centrifuge asset.

contracts/Forwarder.sol

@@ -1,6 +1,5 @@
 // SPDX-License-Identifier: LGPL-3.0-only
 pragma solidity 0.8.11;
-pragma experimental ABIEncoderV2;
 
 import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
 import "@openzeppelin/contracts/utils/cryptography/draft-EIP712.sol";

contracts/TestContracts.sol

@@ -1,6 +1,5 @@
 // SPDX-License-Identifier: LGPL-3.0-only
 pragma solidity 0.8.11;
-pragma experimental ABIEncoderV2;
 
 import "./utils/SafeCast.sol";
 import "./handlers/HandlerHelpers.sol";

contracts/handlers/ERC1155Handler.sol

@@ -1,6 +1,5 @@
 // SPDX-License-Identifier: LGPL-3.0-only
 pragma solidity 0.8.11;
-pragma experimental ABIEncoderV2;
 
 import "../interfaces/IDepositExecute.sol";
 import "./HandlerHelpers.sol";

contracts/handlers/ERC20Handler.sol

@@ -1,6 +1,5 @@
 // SPDX-License-Identifier: LGPL-3.0-only
 pragma solidity 0.8.11;
-pragma experimental ABIEncoderV2;
 
 import "../interfaces/IDepositExecute.sol";
 import "./HandlerHelpers.sol";

contracts/handlers/ERC721Handler.sol

@@ -1,6 +1,5 @@
 // SPDX-License-Identifier: LGPL-3.0-only
 pragma solidity 0.8.11;
-pragma experimental ABIEncoderV2;
 
 import "../interfaces/IDepositExecute.sol";
 import "./HandlerHelpers.sol";

contracts/handlers/GenericHandler.sol

@@ -1,6 +1,5 @@
 // SPDX-License-Identifier: LGPL-3.0-only
 pragma solidity 0.8.11;
-pragma experimental ABIEncoderV2;
 
 import "../interfaces/IGenericHandler.sol";