[css-regions-1] Remove definition of break properties, since they're already defined in the css-break-3 CR.

Author: fantasai

css-regions-1/Overview.bs

@@ -826,78 +826,15 @@ Nested fragmentation contexts</h4>
 	described below.
 
 <h3 id="region-flow-break">
-Region flow break properties: 'break-before', 'break-after', 'break-inside'</h3>
-
-<div class="note"><span class="note-prefix">Note </span>
-
-	This section is also defined in [[!CSS3-BREAK]].
-	If that specification moves to last call
-	with the region values,
-	the section here can be replaced by a reference.
-</div>
-
-	User agents laying out content in multiple regions
-	must determine where content breaks occur.
-	The problem of breaking content into fragments fitting in regions
-	is similar to breaking content into pages or columns.
-
-	Each break ends layout in the current region
-	and causes remaining pieces of content
-	from the <a>named flow</a> to be visually formatted
-	in the following region in the <a>region chain</a>,
-	if there is one.
-
-	The following extends
-	the 'break-before', 'break-after' and 'break-inside' properties
-	from the [[!CSS3COL]] specification to account for regions.
-	The additional values are described below.
-
-	<pre class='propdef'>
-		Name: break-before
-		Value: auto | always | avoid | left | right | page | column | region | avoid-page | avoid-column | avoid-region
-		Initial: auto
-		Applies To: block-level elements
-		Inherited: no
-		Computed Value: as specified
-	</pre>
-
-	<pre class='propdef'>
-		Name: break-after
-		Value: auto | always | avoid | left | right | page | column | region | avoid-page | avoid-column | avoid-region
-		Initial: auto
-		Applies To: block-level elements
-		Inherited: no
-		Computed Value: as specified
-	</pre>
-
-	<pre class='propdef'>
-		Name: break-inside
-		Value: auto | avoid | avoid-page | avoid-column | avoid-region
-		Initial: auto
-		Applies To: block-level elements
-		Inherited: no
-		Computed Value: as specified
-	</pre>
-
-	These properties describe page, column and region break behavior
-	before/after/inside the generated box. These values are normatively defined
-	in [[!CSS3COL]]:
-
-	This specification adds the following new values:
-
-	<dl>
-		<dt>region</dt>
-
-		<dd>Always force a region break before (after) the generated box.</dd>
-
-		<dt>avoid-region</dt>
-
-		<dd>Avoid a region break before (after, inside) the generated box.</dd>
-	</dl>
-
-	The behavior of region breaks with regards to regions
-	is identical to the behavior of page breaks with regards to pages,
-	as defined in the [[!CSS21]].
+Controlling Region Flow Breaks</h3>
+
+	Fragmentation across regions can be controlled with the
+	'break-inside', 'break-before', and 'break-after' properties:
+	the generic values ''break-before/auto'', ''break-before/always'', and ''break-before/avoid''
+	affect content flowed through regions just as they do content flowed through columns or pages,
+	and the ''break-before/region'' and ''break-before/avoid-region'' values
+	provide region-specific breaking controls.
+	See [[css-break-3]] for details.
 
 <h3 id="the-region-fragment-property">
 The region-fragment property</h3>