[css-color-4] Remove old issue w3c#445 which was untagged from color-4 a couple of years ago.

Author: svgeesus

css-color-4/Overview.bs

@@ -4448,13 +4448,6 @@ Color Interpolation</h2>
 	Interpolating to or from ''<color>/currentcolor'' is possible.
 	The numerical value used for this purpose is the used value.
 
-	ISSUE: Computed value needs to be able to represent
-	combinations of ''currentColor'' and an actual color.
-	Consider the value of 'text-emphasis-color' in
-	<code>div { text-emphasis: circle; transition: all 2s; }<br>
-	div:hover { text-emphasis-color: lime; }<br>
-	em { color: red; }</code>
-	See <a href="https://github.com/w3c/csswg-drafts/issues/445">Issue 445</a>.
 
 <h3 id="interpolation-space">
 Color Space for Interpolation</h3>