Update EmbeddedWallet.Misc.cs

Author: 0xFirekeeper

Thirdweb/Thirdweb.Wallets/InAppWallet/EmbeddedWallet/EmbeddedWallet.Misc.cs

@@ -1,7 +1,5 @@
 using System.Security.Cryptography;
 using Nethereum.Web3.Accounts;
-using System;
-using Org.BouncyCastle.Crypto;
 using Org.BouncyCastle.Crypto.Paddings;
 using Org.BouncyCastle.Crypto.Engines;
 using Org.BouncyCastle.Crypto.Parameters;