feat: remove enableLegacyContracts (#13562)

* feat: remove enableLegacyContracts

* feat: remove setUseFaultProofs

* feat: Remove useFaultProofs branch in Deploy._run()

* gas snapshot

* feat: remove useFaultProofs

packages/contracts-bedrock/scripts/deploy/Deploy.s.sol

@@ -207,14 +207,12 @@ contract Deploy is Deployer {
         // Deploy Current OPChain Contracts
         deployOpChain();
 
-        // Apply modifications for non-standard configurations not supported by the OPCM deployment
-        if (cfg.useFaultProofs()) {
+        // Set the respected game type according to the deploy config
         vm.startPrank(ISuperchainConfig(mustGetAddress("SuperchainConfigProxy")).guardian());
         IOptimismPortal2(mustGetAddress("OptimismPortalProxy")).setRespectedGameType(
             GameType.wrap(uint32(cfg.respectedGameType()))
         );
         vm.stopPrank();
-        }
 
         if (cfg.useCustomGasToken()) {
             // Reset the systemconfig then reinitialize it with the custom gas token

packages/contracts-bedrock/scripts/deploy/DeployConfig.s.sol

@@ -78,7 +78,6 @@ contract DeployConfig is Script {
     uint256 public proofMaturityDelaySeconds;
     uint256 public disputeGameFinalityDelaySeconds;
     uint256 public respectedGameType;
-    bool public useFaultProofs;
     bool public useAltDA;
     string public daCommitmentType;
     uint256 public daChallengeWindow;
@@ -148,7 +147,6 @@ contract DeployConfig is Script {
         requiredProtocolVersion = stdJson.readUint(_json, "$.requiredProtocolVersion");
         recommendedProtocolVersion = stdJson.readUint(_json, "$.recommendedProtocolVersion");
 
-        useFaultProofs = _readOr(_json, "$.useFaultProofs", false);
         proofMaturityDelaySeconds = _readOr(_json, "$.proofMaturityDelaySeconds", 0);
         disputeGameFinalityDelaySeconds = _readOr(_json, "$.disputeGameFinalityDelaySeconds", 0);
         respectedGameType = _readOr(_json, "$.respectedGameType", 0);
@@ -222,11 +220,6 @@ contract DeployConfig is Script {
         useAltDA = _useAltDA;
     }
 
-    /// @notice Allow the `useFaultProofs` config to be overridden in testing environments
-    function setUseFaultProofs(bool _useFaultProofs) public {
-        useFaultProofs = _useFaultProofs;
-    }
-
     /// @notice Allow the `useInterop` config to be overridden in testing environments
     function setUseInterop(bool _useInterop) public {
         useInterop = _useInterop;

packages/contracts-bedrock/snapshots/.gas-snapshot

 GasBenchMark_L1BlockInterop_DepositsComplete:test_depositsComplete_benchmark() (gas: 7567)
 GasBenchMark_L1BlockInterop_DepositsComplete_Warm:test_depositsComplete_benchmark() (gas: 5567)
-GasBenchMark_L1BlockInterop_SetValuesInterop:test_setL1BlockValuesInterop_benchmark() (gas: 175722)
-GasBenchMark_L1BlockInterop_SetValuesInterop_Warm:test_setL1BlockValuesInterop_benchmark() (gas: 5144)
+GasBenchMark_L1BlockInterop_SetValuesInterop:test_setL1BlockValuesInterop_benchmark() (gas: 175677)
+GasBenchMark_L1BlockInterop_SetValuesInterop_Warm:test_setL1BlockValuesInterop_benchmark() (gas: 5099)
 GasBenchMark_L1Block_SetValuesEcotone:test_setL1BlockValuesEcotone_benchmark() (gas: 158531)
 GasBenchMark_L1Block_SetValuesEcotone_Warm:test_setL1BlockValuesEcotone_benchmark() (gas: 7597)
-GasBenchMark_L1CrossDomainMessenger:test_sendMessage_benchmark_0() (gas: 369235)
+GasBenchMark_L1CrossDomainMessenger:test_sendMessage_benchmark_0() (gas: 369280)
 GasBenchMark_L1CrossDomainMessenger:test_sendMessage_benchmark_1() (gas: 2967442)
 GasBenchMark_L1StandardBridge_Deposit:test_depositERC20_benchmark_0() (gas: 564429)
 GasBenchMark_L1StandardBridge_Deposit:test_depositERC20_benchmark_1() (gas: 4076577)

packages/contracts-bedrock/test/setup/CommonTest.sol

@@ -34,7 +34,6 @@ contract CommonTest is Test, Setup, Events {
     FFIInterface constant ffi = FFIInterface(address(uint160(uint256(keccak256(abi.encode("optimism.ffi"))))));
 
     bool useAltDAOverride;
-    bool useLegacyContracts;
     address customGasToken;
     bool useInteropOverride;
 
@@ -60,10 +59,6 @@ contract CommonTest is Test, Setup, Events {
         if (useAltDAOverride) {
             deploy.cfg().setUseAltDA(true);
         }
-        // We default to fault proofs unless explicitly disabled by useLegacyContracts
-        if (!useLegacyContracts) {
-            deploy.cfg().setUseFaultProofs(true);
-        }
         if (customGasToken != address(0)) {
             deploy.cfg().setUseCustomGasToken(customGasToken);
         }
@@ -73,7 +68,7 @@ contract CommonTest is Test, Setup, Events {
 
         if (isForkTest()) {
             // Skip any test suite which uses a nonstandard configuration.
-            if (useAltDAOverride || useLegacyContracts || customGasToken != address(0) || useInteropOverride) {
+            if (useAltDAOverride || customGasToken != address(0) || useInteropOverride) {
                 vm.skip(true);
             }
         } else {
@@ -171,16 +166,6 @@ contract CommonTest is Test, Setup, Events {
         emit TransactionDeposited(_from, _to, 0, abi.encodePacked(_mint, _value, _gasLimit, _isCreation, _data));
     }
 
-    function enableLegacyContracts() public {
-        // Check if the system has already been deployed, based off of the heuristic that alice and bob have not been
-        // set by the `setUp` function yet.
-        if (!(alice == address(0) && bob == address(0))) {
-            revert("CommonTest: Cannot enable fault proofs after deployment. Consider overriding `setUp`.");
-        }
-
-        useLegacyContracts = true;
-    }
-
     function enableAltDA() public {
         // Check if the system has already been deployed, based off of the heuristic that alice and bob have not been
         // set by the `setUp` function yet.

packages/contracts-bedrock/test/vendor/Initializable.t.sol

@@ -44,7 +44,6 @@ contract Initializer_Test is CommonTest {
 
     function setUp() public override {
         super.enableAltDA();
-        super.enableLegacyContracts();
         super.setUp();
 
         // Initialize the `contracts` array with the addresses of the contracts to test, the