LibWeb: Remove exceptional return types from infallible stream IDL

Author: https://github.com/trflynn89
Commit: 2d4d16ac37
Pull-request: https://github.com/SerenityOS/serenity/pull/24165
Reviewed-by: https://github.com/kennethmyhra ✅
Reviewed-by: https://github.com/shannonbooth ✅

Userland/Libraries/LibWeb/Streams/ReadableStreamBYOBReader.cpp

@@ -107,7 +107,7 @@ private:
 JS_DEFINE_ALLOCATOR(BYOBReaderReadIntoRequest);
 
 // https://streams.spec.whatwg.org/#byob-reader-read
-WebIDL::ExceptionOr<JS::NonnullGCPtr<JS::Promise>> ReadableStreamBYOBReader::read(JS::Handle<WebIDL::ArrayBufferView>& view)
+JS::NonnullGCPtr<JS::Promise> ReadableStreamBYOBReader::read(JS::Handle<WebIDL::ArrayBufferView>& view)
 {
     auto& realm = this->realm();