Remove unused private instance variable.
diff --git a/commons-vfs2-jackrabbit2/src/main/java/org/apache/commons/vfs2/provider/webdav4/Webdav4FileObject.java b/commons-vfs2-jackrabbit2/src/main/java/org/apache/commons/vfs2/provider/webdav4/Webdav4FileObject.java
index 3cfad6c..b99284a 100644
--- a/commons-vfs2-jackrabbit2/src/main/java/org/apache/commons/vfs2/provider/webdav4/Webdav4FileObject.java
+++ b/commons-vfs2-jackrabbit2/src/main/java/org/apache/commons/vfs2/provider/webdav4/Webdav4FileObject.java
@@ -220,7 +220,6 @@
     /** The FileSystemConfigBuilder */
     private final Webdav4FileSystemConfigBuilder builder;
 
-    private final Webdav4FileSystem fileSystem;
 
     protected Webdav4FileObject(final AbstractFileName name, final Webdav4FileSystem fileSystem)
             throws FileSystemException {
@@ -230,7 +229,6 @@
     protected Webdav4FileObject(final AbstractFileName name, final Webdav4FileSystem fileSystem,
             final Webdav4FileSystemConfigBuilder builder) throws FileSystemException {
         super(name, fileSystem, builder);
-        this.fileSystem = fileSystem;
         this.builder = builder;
     }