Bug 1737535 [wpt PR 31367] - Remove abortReason from WritableStreamDe…

…faultController interface, a=testonly

Automatic update from web-platform-tests
Remove abortReason from WritableStreamDefaultController interface

See whatwg/streams#1177, and especially whatwg/streams#1177 (comment) as to why this is not a bot-generated commit.
--

wpt-commits: 96ca25f0f7526282c0d47e6bf6a7edd439da1968
wpt-pr: 31367

testing/web-platform/tests/interfaces/streams.idl

@@ -159,7 +159,6 @@ interface WritableStreamDefaultWriter {
 
 [Exposed=(Window,Worker,Worklet)]
 interface WritableStreamDefaultController {
-  readonly attribute any abortReason;
   readonly attribute AbortSignal signal;
   undefined error(optional any e);
 };