Remove SendStreamParameters (#303)

Fixes #277.

index.bs

@@ -552,7 +552,7 @@ interface WebTransport {
   /* a ReadableStream of BidirectionalStream objects */
   readonly attribute ReadableStream incomingBidirectionalStreams;
 
-  Promise<SendStream> createUnidirectionalStream(optional SendStreamParameters parameters = {});
+  Promise<SendStream> createUnidirectionalStream();
   /* a ReadableStream of ReceiveStream objects */
   readonly attribute ReadableStream incomingUnidirectionalStreams;
 };
@@ -974,14 +974,6 @@ that determine how WebTransport connection is established and used.
    [=fetch=] operations.
 :: This cannot be used with {{WebTransportOptions/allowPooling}}.
 
-<pre class="idl">
-dictionary SendStreamParameters {
-};
-</pre>
-
-The <dfn dictionary>SendStreamParameters</dfn> dictionary includes information
-relating to stream configuration.
-
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 To <dfn>compute a certificate fingerprint</dfn>, do the following:
 1. Let |cert| be the input certificate, represented as a DER encoding of