Drop trait XMLEvent from Document and SpecialNode classes

Author: ashawley

shared/src/main/scala/scala/xml/Document.scala

@@ -20,7 +20,7 @@ import scala.collection.Seq
  *  @author  Burak Emir
  */
 @SerialVersionUID(-2289320563321795109L)
-class Document extends NodeSeq with pull.XMLEvent with Serializable {
+class Document extends NodeSeq with Serializable {
 
   /**
    * An ordered list of child information items, in document

shared/src/main/scala/scala/xml/SpecialNode.scala

@@ -13,12 +13,9 @@ package xml
  * `SpecialNode` is a special XML node which represents either text
  *  `(PCDATA)`, a comment, a `PI`, or an entity ref.
  *
- *  `SpecialNode`s also play the role of [[scala.xml.pull.XMLEvent]]s for
- *  pull-parsing.
- *
  *  @author Burak Emir
  */
-abstract class SpecialNode extends Node with pull.XMLEvent {
+abstract class SpecialNode extends Node {
 
   /** always empty */
   final override def attributes = Null