Clean up and remove unneeded references

SparkleLib/Git/SparkleRepoGit.cs

@@ -17,10 +17,8 @@
 
 using System;
 using System.Collections.Generic;
-using System.Diagnostics;
 using System.IO;
 using System.Text.RegularExpressions;
-using System.Xml;
 
 namespace SparkleLib {
 

SparkleLib/SparkleAnnouncement.cs

@@ -16,7 +16,6 @@
 
 
 using System;
-using System.Collections.Generic;
 
 namespace SparkleLib {
 

SparkleLib/SparkleFetcherBase.cs

@@ -16,9 +16,7 @@
 
 
 using System;
-using System.Diagnostics;
 using System.IO;
-using System.Security.AccessControl;
 using System.Text.RegularExpressions;
 using System.Threading;
 

SparkleLib/SparkleListenerFactory.cs

@@ -44,7 +44,7 @@ namespace SparkleLib {
                 // folder identifier, a SHA-1 hash) for when it's time to sync.
                 // Clients also send the current revision hash to the channel
                 // for other clients to pick up when you've synced up any
-                // changes. This way
+                // changes.
                 //
                 // Please see the SparkleShare wiki if you wish to run
                 // your own service instead

SparkleLib/SparkleRepoBase.cs

@@ -23,7 +23,6 @@ using System.Text;
 using System.Text.RegularExpressions;
 using System.Threading;
 using System.Timers;
-using System.Xml;
 
 namespace SparkleLib {