clean up: remove unused namespaces

Disco.Data/Repository/DiscoDatabaseConnectionFactory.cs

@@ -1,12 +1,8 @@
 using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
 using System.Data.Entity.Infrastructure;
 using Microsoft.Win32;
 using System.Data.Common;
 using System.Security;
-using System.Security.Permissions;
 
 namespace Disco.Data.Repository
 {

Disco.Data/Repository/Monitor/RepositoryMonitor.cs

@@ -1,9 +1,6 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using System.Reactive;
 using System.Reactive.Subjects;
 using System.Data.Entity.Infrastructure;
 using System.Collections.Concurrent;

Disco.Data/Repository/Monitor/RepositoryMonitorEvent.cs

@@ -3,9 +3,6 @@ using System;
 using System.Collections.Generic;
 using System.Data.Entity.Infrastructure;
 using System.Data.Objects;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 
 namespace Disco.Data.Repository.Monitor
 {

Disco.Data/Repository/Monitor/RepositoryMonitorEventType.cs

@@ -1,10 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace Disco.Data.Repository.Monitor
+namespace Disco.Data.Repository.Monitor
 {
     public enum RepositoryMonitorEventType
     {