ModApi.UpdateManager: misc changes

Author: Rosalie241

ModApi.UpdateManager/DllsUpdater.cs

@@ -29,9 +29,11 @@ public class GithubRelease
 
         private static string GithubRequestGET(string uri)
         {
-            var downloadClient = new DownloadClient(uri);
-            downloadClient.AddHeader("Accept", "application/vnd.github.v3+json");
-            return downloadClient.DownloadString();
+            using (var downloadClient = new DownloadClient(uri))
+            {
+                downloadClient.AddHeader("Accept", "application/vnd.github.v3+json");
+                return downloadClient.DownloadString();
+            }
         }
 
         private static GithubRelease GetLatestGithubRelease(string repoUser, string repoName)

ModApi.UpdateManager/DownloadClient.cs

@@ -1,11 +1,6 @@
 using System;
-using System.Collections.Generic;
 using System.IO;
-using System.Linq;
 using System.Net.Http;
-using System.Text;
-using System.Threading.Tasks;
-using System.Windows.Forms;
 
 namespace ModApi.UpdateManager
 {