[css-pseudo-4] Remove special float case of ::first-letter per WG resolution.

Author: fantasai

css-pseudo/Overview.bs

@@ -323,9 +323,7 @@ Finding the First Letter</h4>
 <h4 id="first-letter-styling">
 Styling the ''::first-letter'' Pseudo-element</h4>
 
-  In CSS a ::first-letter pseudo-element is similar to an inline-level element
-  if its 'float' property is ''float/none'';
-  otherwise, it is similar to a floated element.
+  In CSS a ::first-letter pseudo-element is similar to an inline-level element.
   The following properties that apply to ''::first-letter'' pseudo-elements:
 
   <ul>
@@ -916,6 +914,7 @@ Changes</h2>
 
   <ul>
     <li>Addition of the ''::marker'' pseudo-element.
+    <li>Removed special handling of floated ''::first-letter'' in favor of <a href="https://www.w3.org/TR/css-inline-3/#initial-letter-styling">initial letter styling</a>. [[CSS-INLINE-3]]
     <li>Defined handling of text decorations on ''::selection'' to match IE's more sensible behavior.
     <li>Links to pseudo-element OM design discussions.
     <li>Various minor clarifications.