[css-color-5] Removed leftover text which still assumed color-mix() was limited to two colors

Author: svgeesus

css-color-5/Overview.bs

@@ -336,11 +336,6 @@ Mixing Colors: the ''color-mix()'' Function {#color-mix}
 	 	https://github.com/w3c/csswg-drafts/issues/11678#issuecomment-2686226875
 	-->
 
-The result of mixing is the color at the specified percentage along the progression
-of the second color to the first color.
-
-Note: As a corollary, a percentage of 0% just returns the other color converted to the specified color space,
-and a percentage of 100% returns the same color converted to the specified color space.
 
 <div class="example" id="ex-mix-lch-peru40">
 	<!--