using clauses cleanup

src/Yavsc.Org/Helpers/Ansi2HtmlEncoder.cs

@@ -3,9 +3,7 @@
 // paul schneider <paul@pschneider.fr> 19/06/2018 15:58 20182018 6 19
 // */
 
-using System.IO;
 using System.Diagnostics;
-using System.Threading.Tasks;
 
 namespace Yavsc.Helpers
 {

src/Yavsc.Org/Helpers/ControllerHelpers.cs

@@ -1,4 +1,3 @@
-using System.Collections.Generic;
 using Microsoft.AspNetCore.Mvc;
 using Yavsc.Abstract.Models.Messaging;
 

src/Yavsc.Org/Helpers/ListItemHelpers.cs

@@ -1,6 +1,3 @@
-
-using System.Collections.Generic;
-using System.Linq;
 using Microsoft.AspNetCore.Mvc.Rendering;
 using Yavsc.Models;
 using Yavsc.Models.Workflow;

src/Yavsc.Org/Helpers/OAuthHelpers.cs

@@ -1,4 +1,3 @@
-using System;
 using System.Security.Cryptography;
 
 namespace Yavsc.Helpers {

src/Yavsc.Org/Helpers/PageHelpers.cs

@@ -1,8 +1,5 @@
-using System;
-using System.Collections.Generic;
 using Microsoft.AspNetCore.Html;
 using Microsoft.AspNetCore.Mvc.Rendering;
-using Microsoft.AspNetCore.Mvc.ViewFeatures;
 using Microsoft.Extensions.Localization;
 
 namespace Yavsc.Server.Helpers

src/Yavsc.Org/Helpers/TeXHelpers.cs

@@ -1,7 +1,4 @@
-using System;
 using System.Diagnostics;
-using System.IO;
-using System.Linq;
 using Microsoft.AspNetCore.Html;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.AspNetCore.Mvc.Rendering;