fix: [N-06] TODO Comments

contracts/ZkSync_SpokePool.sol

@@ -12,9 +12,6 @@ interface ZkBridgeLike {
     ) external;
 }
 
-// TODO: Find the mainnet source code, can't seem to find it in here:
-// https://github.com/matter-labs/era-contracts/blob/6391c0d7bf6184d7f6718060e3991ba6f0efe4a7/zksync/contracts
-// https://github.com/matter-labs/v2-testnet-contracts/blob/main/l2/system-contracts/L2EthToken.sol#L74
 interface IL2ETH {
     function withdraw(address _l1Receiver) external payable;
 }

contracts/chain-adapters/ZkSync_Adapter.sol

@@ -72,28 +72,27 @@
     // goes live. For now, we'll hardcode these and use aggressive values to ensure inclusion.
 
     // Limit on L2 gas to spend.
     uint256 public constant l2GasLimit = 300_000;
 
     // How much gas is required to publish a byte of data from L1 to L2. 800 is the required value
     // as set here https://github.com/matter-labs/era-contracts/blob/6391c0d7bf6184d7f6718060e3991ba6f0efe4a7/ethereum/contracts/zksync/facets/Mailbox.sol#L226
     // Note, this value can change and will require an updated adapter.
     uint256 public constant l1GasToL2GasPerPubDataLimit = 800;
 
     // This address receives any remaining fee after an L1 to L2 transaction completes.
     // If refund recipient = address(0) then L2 msg.sender is used, unelss msg.sender is a contract then its address
     // gets aliased.
     address public constant l2RefundAddress = 0x428AB2BA90Eba0a4Be7aF34C9Ac451ab061AC010;
 
     // Hardcode the following ZkSync system contract addresses to save gas on construction. This adapter can be
     // redeployed in the event that the following addresses change.
 
     // Main contract used to send L1 --> L2 messages. Fetchable via `zks_getMainContract` method on JSON RPC.
     ZkSyncInterface public constant zkSync = ZkSyncInterface(0x32400084C286CF3E17e7B677ea9583e60a000324);
     // Bridges to send ERC20 and ETH to L2. Fetchable via `zks_getBridgeContracts` method on JSON RPC.
     ZkBridgeLike public constant zkErc20Bridge = ZkBridgeLike(0x57891966931Eb4Bb6FB81430E6cE0A03AAbDe063);
 
-    // Set l1Weth at construction time to make testing easier. TODO: Think of some way to be able to hardcode this
-    // while keeping unit tests easy to write with custom WETH that we can mint/transfer.
+    // Set l1Weth at construction time to make testing easier.
     WETH9Interface public immutable l1Weth;
 
     event ZkSyncMessageRelayed(bytes32 canonicalTxHash);