XStream comes with xpp transitively

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@8540 71c3de6d-444a-0410-be80-ed276b4c234a

core/pom.xml

@@ -434,11 +434,6 @@
       <artifactId>spring-core</artifactId>
       <version>2.5</version>
     </dependency>
-    <dependency>
-      <groupId>xpp3</groupId>
-      <artifactId>xpp3</artifactId>
-      <version>1.1.3.3</version>
-    </dependency>
     <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>