[cssom] Remove Element#pseudo() and PseudoElement

Fixes https://www.w3.org/Bugs/Public/show_bug.cgi?id=29466.

Author: zcorpan

cssom/Overview.bs

@@ -2096,7 +2096,7 @@ the DOM a <a>CSS declaration block</a> is a
  <dd>The <a for=/>CSS rule</a> that the <a>CSS declaration block</a> is associated with, if any, or null otherwise.
 
  <dt><dfn>owner node</dfn>
- <dd>The {{Element}} or {{PseudoElement}} that the <a>CSS declaration block</a> is associated with, if any, or
+ <dd>The {{Element}} that the <a>CSS declaration block</a> is associated with, if any, or
  null otherwise.
 </dl>
 
@@ -2934,51 +2934,6 @@ a separate interface, <code>ViewCSS</code>.
 sheets</a> with the <a>origin-clean flag</a> unset.
 
 
-Extensions to the {{Element}} Interface {#extensions-to-the-element-interface}
-------------------------------------------------------------------------------
-
-<pre class=idl>
-partial interface Element {
-  PseudoElement? pseudo(DOMString pseudoElt);
-};
-</pre>
-
-<p class=atrisk>The <dfn method for=Element>pseudo(<var>pseudoElt</var>)</dfn> method, when invoked, must run the following steps:
-<ol>
- <li>If <var>pseudoElt</var> is as an <a>ASCII case-insensitive</a> match for either ':before' or
- '::before' return the {{PseudoElement}} representing the ''::before'' pseudo-element of the
- <a>context object</a>.
- <li>If <var>pseudoElt</var> is as an <a>ASCII case-insensitive</a> match for either ':after' or
- '::after' return the {{PseudoElement}} representing the ''::after'' pseudo-element of the
- <a>context object</a>.
- <li>Return null.
-</ol>
-When invoked with an argument that returns a {{PseudoElement}} object representing a particular pseudo-element, the same object must be
-returned as returned by an earlier call that represent the same pseudo-element.
-
-
-
-The {{PseudoElement}} Interface {#the-pseudoelement-interface}
---------------------------------------------------------------
-
-<p class=atrisk>The {{PseudoElement}} interface is used for representing CSS pseudo-elements. A {{PseudoElement}} object is associated with an
-<code>Element</code> object.
-
-Issue: This should be merged with the {{CSSPseudoElement}} proposal.
-
-<pre class=idl>
-interface PseudoElement {
-<!-- XXX
-  // type
-  // style
-  // ownerElement
-  // querySelector should return PseudoElements
-  // Extend Event to expose PseudoElement?
--->
-};
-</pre>
-
-
 Utility APIs {#utility-apis}
 ============================
 
@@ -3124,6 +3079,8 @@ generally not listed.
 
 CSSCharsetRule is re-dropped.
 GetStyleUtils is dropped.
+Element#pseudo() is dropped.
+PseudoElement is dropped.
 
 -->
 
@@ -3151,12 +3108,12 @@ Changes From 12 July 2011 To 5 December 2013 {#changes-from-12-july-2011-to-5-de
  <li>The <code>style</code> and <code>media</code> attributes of various interfaces are annotated with the <code>[PutForwards]</code> WebIDL
  extended attribute.
 
- <li>The {{Element/pseudo()}} method on <code>Element</code> is introduced.
+ <li>The <code lt>pseudo()</code> method on <code>Element</code> is introduced.
 
- <li>The {{PseudoElement}} interface is introduced.
+ <li>The <code lt>PseudoElement</code> interface is introduced.
 
  <li>The <code lt>cascadedStyle</code>, <code lt>rawComputedStyle</code> and
- <code lt>usedStyle</code> attributes on <code>Element</code> and {{PseudoElement}} are introduced.
+ <code lt>usedStyle</code> attributes on <code>Element</code> and <code lt>PseudoElement</code> are introduced.
 
  <li>The <code method for=CSS>CSS.escape()</code> static method is introduced.
 </ul>