[css-syntax] Remove redundant limitation on @charset size.

Author: SimonSapin

css-syntax/Overview.src.html

@@ -302,10 +302,6 @@ <h3 id="input-byte-stream">
 				where the "…" is the sequence of bytes corresponding to the encoding's label.
 			</details>
 
-			UAs may impose an arbitrary limit upon the number of <code>XX</code> bytes scanned,
-			as long as it is large enough to encompass all of the <a href="http://encoding.spec.whatwg.org/#label">labels</a> defined in [[!ENCODING]];
-			at the time of writing this specification these are all 19 or fewer bytes long.
-
 			If the return value was <code>utf-16be</code> or <code>utf-16le</code>,
 			use <code>utf-8</code> as the fallback encoding;
 			if it was anything else except failure,