contracts-bedrock: remove deployment ownable check l1xdm

The new `L1CrossDomainMessenger` is no longer ownable so we no
longer need to transfer the ownership to the dictator as part
of the system upgrade. The dictator does not need ownership
of the old contract because it doesn't call `pause` on the
`L1CrossDomainMessenger` anymore as part of the on chain upgrade.
Instead, the pausable functionality is in the `OptimismPortal`
which is set with a constructor arg and its pausability can
be toggled using functions on the portal.

packages/contracts-bedrock/deploy/020-SystemDictatorSteps-1.ts

@@ -23,7 +23,6 @@ const deployFn: DeployFunction = async (hre) => {
     SystemDictator,
     ProxyAdmin,
     AddressManager,
-    L1CrossDomainMessenger,
     L1StandardBridgeProxy,
     L1StandardBridgeProxyWithSigner,
     L1ERC721BridgeProxy,
@@ -43,11 +42,6 @@ const deployFn: DeployFunction = async (hre) => {
       name: 'Lib_AddressManager',
       signerOrProvider: deployer,
     },
-    {
-      name: 'Proxy__OVM_L1CrossDomainMessenger',
-      iface: 'L1CrossDomainMessenger',
-      signerOrProvider: deployer,
-    },
     {
       name: 'Proxy__OVM_L1StandardBridge',
     },
@@ -118,41 +112,6 @@ const deployFn: DeployFunction = async (hre) => {
     console.log(`AddressManager already owned by the SystemDictator`)
   }
 
-  // Transfer ownership of the L1CrossDomainMessenger to SystemDictator.
-  if (
-    needsProxyTransfer &&
-    (await AddressManager.getAddress('OVM_L1CrossDomainMessenger')) !==
-      ethers.constants.AddressZero &&
-    (await L1CrossDomainMessenger.owner()) !== SystemDictator.address
-  ) {
-    if (isLiveDeployer) {
-      console.log(`Setting L1CrossDomainMessenger owner to MSD`)
-      await L1CrossDomainMessenger.transferOwnership(SystemDictator.address)
-    } else {
-      const tx =
-        await L1CrossDomainMessenger.populateTransaction.transferOwnership(
-          SystemDictator.address
-        )
-      console.log(`Please transfer L1CrossDomainMessenger owner to MSD`)
-      console.log(`L1XDM address: ${L1CrossDomainMessenger.address}`)
-      console.log(`MSD address: ${SystemDictator.address}`)
-      console.log(`JSON:`)
-      console.log(jsonifyTransaction(tx))
-    }
-
-    // Wait for the ownership transfer to complete.
-    await awaitCondition(
-      async () => {
-        const owner = await L1CrossDomainMessenger.owner()
-        return owner === SystemDictator.address
-      },
-      30000,
-      1000
-    )
-  } else {
-    console.log(`L1CrossDomainMessenger already owned by MSD`)
-  }
-
   // Transfer ownership of the L1StandardBridge (proxy) to SystemDictator.
   if (
     needsProxyTransfer &&