Editorial: remove optional from chunk parameter in QueuingStrategySize

Since this is used as the input type in the init dictionaries, and the spec always calls the function with an argument, the optional is not necessary.

Author: MattiasBuelens

index.bs

@@ -5861,7 +5861,7 @@ dictionary QueuingStrategy {
   QueuingStrategySize size;
 };
 
-callback QueuingStrategySize = unrestricted double (optional any chunk);
+callback QueuingStrategySize = unrestricted double (any chunk);
 </xmp>
 
 <dl>

reference-implementation/lib/QueuingStrategy.webidl

@@ -3,4 +3,4 @@ dictionary QueuingStrategy {
   QueuingStrategySize size;
 };
 
-callback QueuingStrategySize = unrestricted double (optional any chunk);
+callback QueuingStrategySize = unrestricted double (any chunk);