fix imports

Author: rbri

src/main/java/org/htmlunit/javascript/JavaScriptEngine.java

@@ -21,7 +21,6 @@
 
 import java.io.IOException;
 import java.io.ObjectInputStream;
-import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Member;
 import java.lang.reflect.Method;
 import java.net.URL;