Minor refactoring.

src/Volo.Abp.Data/Volo.Abp.Data.csproj.DotSettings

@@ -0,0 +1,2 @@
+<wpf:ResourceDictionary xml:space="preserve" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:s="clr-namespace:System;assembly=mscorlib" xmlns:ss="urn:shemas-jetbrains-com:settings-storage-xaml" xmlns:wpf="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
+	<s:String x:Key="/Default/CodeInspection/CSharpLanguageProject/LanguageLevel/@EntryValue">CSharp71</s:String></wpf:ResourceDictionary>

src/Volo.Abp.Data/Volo/Abp/Uow/UnitOfWorkDefaultOptions.cs

@@ -1,6 +1,5 @@
 using System;
 using System.Data;
-using System.Reflection;
 
 namespace Volo.Abp.Uow
 {

src/Volo.Abp.Data/Volo/Abp/Uow/UnitOfWorkInterceptor.cs

@@ -1,5 +1,4 @@
 using System;
-using System.Net.Http;
 using System.Threading.Tasks;
 using JetBrains.Annotations;
 using Microsoft.Extensions.Options;