Remove ABIEncoderV2 experimental pragma

as activated by default in 0.8

integration-tests/contracts/OVMMulticall.sol

@@ -20,8 +20,6 @@ copies or substantial portions of the Software.
 
 pragma solidity ^0.8.4;
 
-pragma experimental ABIEncoderV2;
-
 // Can't do this until the package is published.
 //import { iOVM_L1BlockNumber } from "@eth-optimism/contracts/iOVM_L1BlockNumber";
 import { iOVM_L1BlockNumber } from "./OVMContextStorage.sol";

packages/contracts/contracts/L1/messaging/IL1CrossDomainMessenger.sol

 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.4;
-pragma experimental ABIEncoderV2;
 
 /* Library Imports */
 import { Lib_OVMCodec } from "../../libraries/codec/Lib_OVMCodec.sol";

packages/contracts/contracts/L1/messaging/IL1ERC20Bridge.sol

 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.4;
-pragma experimental ABIEncoderV2;
 
 /**
  * @title IL1ERC20Bridge

packages/contracts/contracts/L1/messaging/IL1StandardBridge.sol

 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.4;
-pragma experimental ABIEncoderV2;
 
 import "./IL1ERC20Bridge.sol";
 

packages/contracts/contracts/L1/messaging/L1CrossDomainMessenger.sol

 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.4;
-pragma experimental ABIEncoderV2;
 
 /* Library Imports */
 import { Lib_AddressResolver } from "../../libraries/resolver/Lib_AddressResolver.sol";

packages/contracts/contracts/L1/messaging/L1StandardBridge.sol

 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.4;
-pragma experimental ABIEncoderV2;
 
 /* Interface Imports */
 import { IL1StandardBridge } from "./IL1StandardBridge.sol";

packages/contracts/contracts/L1/rollup/CanonicalTransactionChain.sol

 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.4;
-pragma experimental ABIEncoderV2;
 
 /* Library Imports */
 import { Lib_OVMCodec } from "../../libraries/codec/Lib_OVMCodec.sol";

packages/contracts/contracts/L1/rollup/ICanonicalTransactionChain.sol

 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.4;
-pragma experimental ABIEncoderV2;
 
 /* Library Imports */
 import { Lib_OVMCodec } from "../../libraries/codec/Lib_OVMCodec.sol";

packages/contracts/contracts/L1/rollup/IStateCommitmentChain.sol

 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.4;
-pragma experimental ABIEncoderV2;
 
 /* Library Imports */
 import { Lib_OVMCodec } from "../../libraries/codec/Lib_OVMCodec.sol";

packages/contracts/contracts/L1/rollup/StateCommitmentChain.sol

 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.4;
-pragma experimental ABIEncoderV2;
 
 /* Library Imports */
 import { Lib_OVMCodec } from "../../libraries/codec/Lib_OVMCodec.sol";

packages/contracts/contracts/L2/messaging/IL2CrossDomainMessenger.sol

 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.4;
-pragma experimental ABIEncoderV2;
 
 /* Interface Imports */
 import { ICrossDomainMessenger } from "../../libraries/bridge/ICrossDomainMessenger.sol";

packages/contracts/contracts/L2/messaging/IL2ERC20Bridge.sol

 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.4;
-pragma experimental ABIEncoderV2;
 
 /**
  * @title IL2ERC20Bridge

packages/contracts/contracts/L2/messaging/L2CrossDomainMessenger.sol

 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.4;
-pragma experimental ABIEncoderV2;
 
 /* Library Imports */
 import { Lib_CrossDomainUtils } from "../../libraries/bridge/Lib_CrossDomainUtils.sol";

packages/contracts/contracts/L2/messaging/L2StandardBridge.sol

 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.4;
-pragma experimental ABIEncoderV2;
 
 /* Interface Imports */
 import { IL1StandardBridge } from "../../L1/messaging/IL1StandardBridge.sol";

packages/contracts/contracts/L2/messaging/L2StandardTokenFactory.sol

 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.4;
-pragma experimental ABIEncoderV2;
 
 /* Contract Imports */
 import { L2StandardERC20 } from "../../libraries/standards/L2StandardERC20.sol";

packages/contracts/contracts/libraries/bridge/ICrossDomainMessenger.sol

 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.4;
-pragma experimental ABIEncoderV2;
 
 /**
  * @title ICrossDomainMessenger

packages/contracts/contracts/libraries/bridge/Lib_CrossDomainUtils.sol

 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.4;
-pragma experimental ABIEncoderV2;
 
 /* Library Imports */
 import { Lib_RLPReader } from "../rlp/Lib_RLPReader.sol";

packages/contracts/contracts/libraries/codec/Lib_OVMCodec.sol

 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.4;
-pragma experimental ABIEncoderV2;
 
 /* Library Imports */
 import { Lib_RLPReader } from "../rlp/Lib_RLPReader.sol";

packages/contracts/contracts/libraries/rlp/Lib_RLPWriter.sol

 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.4;
-pragma experimental ABIEncoderV2;
 
 /**
  * @title Lib_RLPWriter

packages/contracts/contracts/libraries/trie/Lib_SecureMerkleTrie.sol

 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.4;
-pragma experimental ABIEncoderV2;
 
 /* Library Imports */
 import { Lib_MerkleTrie } from "./Lib_MerkleTrie.sol";

packages/contracts/contracts/test-libraries/codec/TestLib_OVMCodec.sol

 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.4;
-pragma experimental ABIEncoderV2;
 
 /* Library Imports */
 import { Lib_OVMCodec } from "../../libraries/codec/Lib_OVMCodec.sol";

packages/contracts/contracts/test-libraries/rlp/TestLib_RLPReader.sol

 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.4;
-pragma experimental ABIEncoderV2;
 
 /* Library Imports */
 import { Lib_RLPReader } from "../../libraries/rlp/Lib_RLPReader.sol";

packages/contracts/contracts/test-libraries/rlp/TestLib_RLPWriter.sol

 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.4;
-pragma experimental ABIEncoderV2;
 
 /* Library Imports */
 import { Lib_RLPWriter } from "../../libraries/rlp/Lib_RLPWriter.sol";

packages/contracts/contracts/test-libraries/trie/TestLib_SecureMerkleTrie.sol

 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.4;
-pragma experimental ABIEncoderV2;
 
 /* Library Imports */
 import { Lib_SecureMerkleTrie } from "../../libraries/trie/Lib_SecureMerkleTrie.sol";

packages/contracts/contracts/test-libraries/utils/TestLib_Buffer.sol

 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.4;
-pragma experimental ABIEncoderV2;
 
 /* Library Imports */
 import { Lib_Buffer } from "../../libraries/utils/Lib_Buffer.sol";

packages/contracts/contracts/test-libraries/utils/TestLib_BytesUtils.sol

 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.4;
-pragma experimental ABIEncoderV2;
 
 /* Library Imports */
 import { Lib_BytesUtils } from "../../libraries/utils/Lib_BytesUtils.sol";

packages/contracts/contracts/test-libraries/utils/TestLib_MerkleTree.sol

 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.4;
-pragma experimental ABIEncoderV2;
 
 /* Library Imports */
 import { Lib_MerkleTree } from "../../libraries/utils/Lib_MerkleTree.sol";

packages/message-relayer/test/test-contracts/MockL2CrossDomainMessenger.sol

 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.4;
-pragma experimental ABIEncoderV2;
 
 contract MockL2CrossDomainMessenger {
     struct MessageData {