Clean up unused imports

Author: jboynes

gcloud-java-storage/src/main/java/com/google/gcloud/storage/StorageImpl.java

@@ -50,10 +50,8 @@
 
 import java.io.Serializable;
 import java.io.UnsupportedEncodingException;
-import java.net.MalformedURLException;
 import java.net.URI;
 import java.net.URISyntaxException;
-import java.net.URL;
 import java.net.URLEncoder;
 import java.security.InvalidKeyException;
 import java.security.NoSuchAlgorithmException;