Remove unused usings (resharper)

Website/Controllers/BlogController.cs

@@ -1,6 +1,4 @@
 using System;
-using System.Collections.Generic;
-using System.Diagnostics;
 using System.Linq;
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Mvc;

Website/Controllers/HomeController.cs

@@ -1,5 +1,4 @@
-using System.Diagnostics;
-using System.Threading.Tasks;
+using System.Threading.Tasks;
 using Microsoft.AspNetCore.Mvc;
 using Website.Data;
 using Website.ViewModels;

Website/Program.cs

@@ -1,12 +1,5 @@
-using System;
-using System.Collections.Generic;
-using System.IO;
-using System.Linq;
-using System.Threading.Tasks;
-using Microsoft.AspNetCore;
+using Microsoft.AspNetCore;
 using Microsoft.AspNetCore.Hosting;
-using Microsoft.Extensions.Configuration;
-using Microsoft.Extensions.Logging;
 
 namespace Website
 {

Website/ViewModels/BlogPostPreviewViewModel.cs

@@ -1,6 +1,4 @@
-using System;
 using Markdig;
-using Markdig.SyntaxHighlighting;
 using Website.Models;
 
 namespace Website.ViewModels

Website/ViewModels/ErrorViewModel.cs

@@ -1,5 +1,3 @@
-using System;
-
 namespace Website.ViewModels
 {
 	public class ErrorViewModel