+ remove unused import.

Author: rlubke

src/main/java/com/ning/http/client/providers/grizzly/GrizzlyAsyncHttpProvider.java

@@ -96,7 +96,6 @@
 import java.io.UnsupportedEncodingException;
 import java.net.InetSocketAddress;
 import java.net.URI;
-import java.net.URL;
 import java.net.URLEncoder;
 import java.nio.ByteBuffer;
 import java.security.NoSuchAlgorithmException;