replace new #styling section with --* propdef update

Author: delan

css-pseudo-4/Overview.bs

@@ -50,13 +50,6 @@ spec:fill-stroke-3; type:property; text:stroke-width
   and on their syntax and interaction with other <a>selectors</a>,
   see [[!SELECTORS-4]].
 
-<h2 id="styling">Styling Pseudo-elements</h2>
-  [=Custom properties=] [[!CSS-VARIABLES-1]] can be specified on--
-  and inherited into--
-  pseudo-elements,
-  even if they would not otherwise apply
-  due to the pseudo-element having a restricted set of applicable CSS properties.
-
 <h2 id="typographic-pseudos">
 Typographic Pseudo-elements</h2>
 

css-variables-1/Overview.bs

@@ -89,7 +89,7 @@ Defining Custom Properties: the '--*' family of properties</h2>
 	Name: --*
 	Value: <<declaration-value>>?
 	Initial: the [=guaranteed-invalid value=]
-	Applies to: all elements
+	Applies to: all elements and all pseudo-elements (including those with restricted property lists)
 	Inherited: yes
 	Computed value: specified value with variables substituted, or the [=guaranteed-invalid value=]
 	Animation type: discrete