[css-color-4] remove incorrect assertions of powerlessness #8609

Author: svgeesus

css-color-4/Overview.bs

@@ -3179,8 +3179,7 @@ Specifying Lab and LCH: the ''lab()'' and ''lch()'' functional notations</h3>
 
 	If the lightness of a Lab color (after clamping) is ''0%'',
 	or ''100%''
-	both the a and b components become powerless
-	and the color will be displayed as black, or white, respectively
+	the color will be displayed as black, or white, respectively
 	due to gamut mapping to the display.
 
 	<div class="example" id="ex-lab-samples">
@@ -3261,8 +3260,7 @@ Specifying Lab and LCH: the ''lab()'' and ''lch()'' functional notations</h3>
 	the hue component is [=powerless=].
 	If the lightness of an LCH color (after clamping) is ''0%'',
 	or ''100%'', 
-	the hue component is [=powerless=]
-	and the color will be displayed as black, or white, respectively
+	the color will be displayed as black, or white, respectively
 	due to gamut mapping to the display.
 
 	<div class="example" id="ex-lch-samples">
@@ -3347,8 +3345,7 @@ Specifying Lab and LCH: the ''lab()'' and ''lch()'' functional notations</h3>
 
 	If the lightness of an Oklab color is ''0%'' or 0,
 	or ''100%'' or 1.0,
-	both the a and b components become powerless
-	and the color will be displayed as black, or white, respectively
+	the color will be displayed as black, or white, respectively
 	due to gamut mapping to the display.
 
 	<div class="example" id="ex-oklab-samples">
@@ -3427,8 +3424,7 @@ Specifying Lab and LCH: the ''lab()'' and ''lch()'' functional notations</h3>
 		the hue component is [=powerless=].
 		If the lightness of an Oklch color is ''0%'' or 0,
 		or ''100%'' or 1.0,
-		the hue component is [=powerless=]
-		and the color will be displayed as black, or white, respectively
+		the color will be displayed as black, or white, respectively
 		due to gamut mapping to the display.
 
 		<div class="example" id="ex-oklch-samples">