Remove: 'Active' Device property

No longer needed.

Disco.Data/Migrations/201302210057463_DBv7.cs

@@ -0,0 +1,18 @@
+namespace Disco.Data.Migrations
+{
+    using System;
+    using System.Data.Entity.Migrations;
+    
+    public partial class DBv7 : DbMigration
+    {
+        public override void Up()
+        {
+            DropColumn("dbo.Devices", "Active");
+        }
+        
+        public override void Down()
+        {
+            AddColumn("dbo.Devices", "Active", c => c.Boolean(nullable: false));
+        }
+    }
+}