[Skip CI] Remove unused references
MODIFY
WalletWasabi.Tests/LiveServerTests.cs
WalletWasabi.Tests/LiveServerTests.cs
-using System;
-using System.Collections.Generic;
using System.Linq;
-using System.Threading;
using System.Threading.Tasks;
using NBitcoin;
-using WalletWasabi.Backend.Models;
using WalletWasabi.Backend.Models.Responses;
using WalletWasabi.Services;
using WalletWasabi.Tests.XunitConfiguration;

[Skip CI] Remove unused references