Remove vertical-align from properties required for ::first-line (per CSS2.1 resolution)

Author: fantasai

selectors3/Overview.html

@@ -2458,7 +2458,6 @@ <h4 id=first-formatted-line><span class=secno>7.1.1. </span><dfn
    class=property>word-spacing</code>&rsquo;, &lsquo;<code
    class=property>letter-spacing</code>&rsquo;, &lsquo;<code
    class=property>text-decoration</code>&rsquo;, &lsquo;<code
-   class=property>vertical-align</code>&rsquo;, &lsquo;<code
    class=property>text-transform</code>&rsquo;, &lsquo;<code
    class=property>line-height</code>&rsquo;. UAs may apply other properties
    as well.

selectors3/Overview.src.html

@@ -1945,7 +1945,7 @@ <h4 id="first-formatted-line"><dfn>First formatted line</dfn> definition in CSS<
 following CSS properties apply to a <code>::first-line</code>
 pseudo-element: font properties, color property, background
 properties, 'word-spacing', 'letter-spacing', 'text-decoration',
-'vertical-align', 'text-transform', 'line-height'. UAs may apply other
+'text-transform', 'line-height'. UAs may apply other
 properties as well.</p>
 
 <p>During CSS inheritance, the portion of a child element that occurs