* optimized usings.

OpenSim/Framework/IClientFileTransfer.cs

@@ -1,4 +1,4 @@
-/*
+/*
  * Copyright (c) Contributors, http://opensimulator.org/
  * See CONTRIBUTORS.TXT for a full list of copyright holders.
  *
@@ -25,9 +25,6 @@
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-using System;
-using System.Collections.Generic;
-using System.Text;
 using OpenMetaverse;
 
 namespace OpenSim.Framework