主要更新了http相关的内容

Ramitta/Database/PostgreSQL.cs

@@ -1,10 +1,5 @@
 using Npgsql;
-using System;
-using System.Collections.Generic;
 using System.Diagnostics;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 
 namespace Ramitta
 {
@@ -145,7 +140,7 @@ namespace Ramitta
                     {
                         for (int i = 0; i < queries.Count; i++)
                         {
-                            using (var cmd = new NpgsqlCommand(queries[i], conn, (NpgsqlTransaction)transaction))
+                            using (var cmd = new NpgsqlCommand(queries[i], conn, transaction))
                             {
                                 var parameters = parametersList[i];
                                 if (parameters != null)