[css-backgrounds-3] remove entire duplicated section

Author: svgeesus

css-backgrounds-3/Overview.bs

@@ -1,6 +1,10 @@
 <pre class='metadata'>
 Title: CSS Backgrounds and Borders Module Level 3
-Status: ED
+Status: CR
+Date: 2020-12-22
+Deadline: 2021-02-22
+Prepare for TR: yes
+Implementation Report: https://test.csswg.org/harness/results/css-backgrounds-3_dev/grouped/
 Work Status: Testing
 Shortname: css-backgrounds
 Level: 3
@@ -69,19 +73,6 @@ is given in this module. For how these layers interact with other
 rendered content, see Appendix E “Elaborate description of Stacking
 Contexts” in [[!CSS2]].
 
-<h2 id="values">
-Values Definitions</h2>
-
-  This specification follows the <a href="https://www.w3.org/TR/CSS2/about.html#property-defs">CSS property definition conventions</a> from [[!CSS2]]
-  using the <a href="https://www.w3.org/TR/css-values-3/#value-defs">value definition syntax</a> from [[!CSS-VALUES-3]].
-  Value types not defined in this specification are defined in CSS Values &amp; Units [[!CSS-VALUES-3]].
-  Other CSS modules may expand the definitions of these value types.
-
-  In addition to the property-specific values listed in their definitions,
-  all properties defined in this specification
-  also accept the <a>CSS-wide keywords</a> as their property value.
-  For readability they have not been repeated explicitly.
-
 <h3 id="placement">
 Module Interactions</h3>