Revert changes in "Clean up shared props usage (#9)"

This reverts some changes done in commit 053aba5.

Author: hhvrc

SDK.CSharp.Example/ExampleConfig.cs

@@ -1,7 +1,4 @@
-using System;
-using System.Collections.Generic;
-
-namespace SDK.CSharp.Example;
+namespace SDK.CSharp.Example;
 
 public sealed class ExampleConfig
 {

SDK.CSharp.Example/Http/PauseShocker.cs

@@ -1,7 +1,4 @@
 using OpenShock.SDK.CSharp;
-using System;
-using System.Linq;
-using System.Threading.Tasks;
 
 namespace SDK.CSharp.Example.Http;
 

SDK.CSharp.Example/IExample.cs

@@ -1,6 +1,4 @@
-using System.Threading.Tasks;
-
-namespace SDK.CSharp.Example;
+namespace SDK.CSharp.Example;
 
 public interface IExample
 {

SDK.CSharp.Example/LiveControl.cs

@@ -2,8 +2,6 @@
 using OpenShock.SDK.CSharp;
 using OpenShock.SDK.CSharp.Live;
 using OpenShock.SDK.CSharp.Models;
-using System;
-using System.Threading.Tasks;
 
 namespace SDK.CSharp.Example;
 

SDK.CSharp.Example/Program.cs

@@ -1,8 +1,5 @@
-using System;
-using System.Collections.Immutable;
-using System.Linq;
+using System.Collections.Immutable;
 using System.Text.Json;
-using System.Threading;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.DependencyInjection.Extensions;

SDK.CSharp.Example/SDK.CSharp.Example.csproj

@@ -3,6 +3,8 @@
     <PropertyGroup>
         <OutputType>Exe</OutputType>
         <TargetFramework>net9.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
     </PropertyGroup>
 
     <ItemGroup>

SDK.CSharp.Example/SignalrHub.cs

@@ -1,8 +1,6 @@
 using OpenShock.SDK.CSharp.Hub;
 using OpenShock.SDK.CSharp.Models;
 using Serilog;
-using System.Linq;
-using System.Threading.Tasks;
 
 namespace SDK.CSharp.Example;