[css-color] Remove another reference to all colors appearing in X11.

Author: tabatkins

css-color/Overview.bs

@@ -279,14 +279,14 @@ Named Colors</h2>
 
 	16 of CSS's named colors come from HTML originally:
 	aqua, black, blue, fuchsia, gray, green, lime, maroon, navy, olive, purple, red, silver, teal, white, and yellow.
-	Nearly all of the rest
-	(save two special values, ''transparent'' and ''currentcolor'')
+	Most of the rest
 	come from one version of the X11 color system,
 	used in Unix-derived systems to specify colors for the console.
+	(Two special color values, ''transparent'' and ''currentcolor'',
+		are specially defined in their own sections.)
 
-	The following table defines all of the HTML and X11 colors,
+	The following table defines all of the opaque named colors,
 	by giving equivalent numeric specifications in the other color syntaxes.
-	All of these colors are fully opaque.
 
 	<table class="named-color-table" dfn-type=value dfn-for="<color>">
 		<thead>

css-color/Overview.html

@@ -442,14 +442,14 @@ <h2 class="heading settled" data-level=5 id=named-colors><span class=secno>5 </s
 
 <p>16 of CSS’s named colors come from HTML originally:
 	aqua, black, blue, fuchsia, gray, green, lime, maroon, navy, olive, purple, red, silver, teal, white, and yellow.
-	Nearly all of the rest
-	(save two special values, <a class=css data-link-type=maybe href=#valdef-color-transparent title=transparent>transparent</a> and <a class=css data-link-type=maybe href=#valdef-color-currentcolor title=currentcolor>currentcolor</a>)
+	Most of the rest
 	come from one version of the X11 color system,
-	used in Unix-derived systems to specify colors for the console.</p>
+	used in Unix-derived systems to specify colors for the console.
+	(Two special color values, <a class=css data-link-type=maybe href=#valdef-color-transparent title=transparent>transparent</a> and <a class=css data-link-type=maybe href=#valdef-color-currentcolor title=currentcolor>currentcolor</a>,
+		are specially defined in their own sections.)</p>
 
-<p>The following table defines all of the HTML and X11 colors,
-	by giving equivalent numeric specifications in the other color syntaxes.
-	All of these colors are fully opaque.</p>
+<p>The following table defines all of the opaque named colors,
+	by giving equivalent numeric specifications in the other color syntaxes.</p>
 
 	<table class=named-color-table data-dfn-for="<color>" data-dfn-type=value>
 		<thead>