Cleanup namespaces

Author: ethanhann

src/InEngine.Core/CommandExtensions.cs

@@ -1,4 +1,5 @@
 using System;
+
 namespace InEngine.Core
 {
     public static class CommandExtensions

src/InEngine.Core/InEngineSettings.cs

@@ -1,7 +1,6 @@
 using System;
 using System.Collections.Generic;
 using System.IO;
-using InEngine.Core.Commands;
 using InEngine.Core.IO;
 using InEngine.Core.Queuing;
 using Microsoft.Extensions.Configuration;

src/InEngine.Core/Scheduling/Schedule.cs

@@ -1,12 +1,10 @@
 using System;
 using System.Collections.Generic;
-using System.Collections.Specialized;
 using System.Linq;
 using System.Linq.Expressions;
 using InEngine.Core.Commands;
 using InEngine.Core.Exceptions;
 using Quartz;
-using Quartz.Impl;
 using Serialize.Linq.Extensions;
 
 namespace InEngine.Core.Scheduling