review fixes

cw_ethereum/lib/ethereum_client.dart

@@ -209,22 +209,7 @@ I/flutter ( 4474): Gas Used: 53000
     }
   }
 
-  Future<String> checkEnsName(String ensName) async {
-    if (_client == null) {
-      return "";
-    }
-    try {
-      final ens = Ens(client: _client!);
-
-      final addr = await ens.withName(ensName).getAddress();
-      return addr.hex;
-    } catch (e) {
-      print(e);
-      return "";
-    }
-  }
-
-  dynamic getWeb3Client() {
+  Web3Client? getWeb3Client() {
     return _client;
   }
 

cw_ethereum/lib/ethereum_wallet.dart

@@ -509,5 +509,5 @@ abstract class EthereumWalletBase
   String signMessage(String message, {String? address = null}) =>
       bytesToHex(_ethPrivateKey.signPersonalMessageToUint8List(ascii.encode(message)));
 
-  dynamic getWeb3Client() => _client.getWeb3Client();
+  Web3Client? getWeb3Client() => _client.getWeb3Client();
 }

lib/entities/ens_record.dart

@@ -20,8 +20,6 @@ class EnsRecord {
     try {
       final ens = Ens(client: _client);
 
-      dynamic res;
-
       if (wallet != null) {
         switch (wallet.type) {
           case WalletType.monero: