Removing unnecessary imports

Author: Jaroslav Tulach

nbbuild/antsrc/org/netbeans/nbbuild/extlibs/DownloadBinaries.java

@@ -31,20 +31,12 @@
 import java.io.OutputStream;
 import java.math.BigInteger;
 import java.net.HttpURLConnection;
-import java.net.InetSocketAddress;
-import java.net.Proxy;
-import java.net.URI;
-import java.net.URISyntaxException;
 import java.net.URL;
 import java.net.URLConnection;
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
 import java.util.ArrayList;
 import java.util.List;
-import java.util.concurrent.CountDownLatch;
-import java.util.concurrent.ExecutorService;
-import java.util.concurrent.Executors;
-import java.util.concurrent.TimeUnit;
 import org.apache.tools.ant.BuildException;
 import org.apache.tools.ant.DirectoryScanner;
 import org.apache.tools.ant.Project;