removed unncessary module import

Author: vimanyu

source/AndroidResolver/src/PlayServicesResolver.cs

@@ -18,7 +18,6 @@ namespace GooglePlayServices {
     using System;
     using System.Collections.Generic;
     using System.IO;
-    using System.Linq;
     using System.Text.RegularExpressions;
     using System.Threading;
     using System.Xml;