[css-sizing-4] Remove note about web-compat of % max-width compression, since that has now been shipping awhile.

Author: fantasai

css-sizing-3/Overview.bs

@@ -1066,9 +1066,6 @@ Intrinsic Contributions of Percentage-Sized Boxes</h4>
 			plus any horizontal margin/border/padding.
 		</div>
 
-		Note: We are not 100% sure if zeroing out a percentage 'max-width' on form controls is web-compatible.
-		See <a href="https://github.com/w3c/csswg-drafts/issues/765">Issue 765</a>.
-
 		<li id=min-percentage-contribution>
 		For the [=min size properties=],
 		as well as for [=margins=] and [=paddings=]