Remove unused variable declaration.

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@269188 13f79535-47bb-0310-9956-ffa450edef68

proposal/myrmidon/src/java/org/apache/ant/modules/core/RegisterTasklib.java

@@ -49,8 +49,6 @@ public class RegisterTasklib
             throw new TaskException( "Must specify lib parameter" );
         }
 
-        URL url = null;
-
         final File file = getContext().resolveFile( m_lib );
 
         try