quic/blob: dead code for fin?

[martenrichter]

@jasnell can you have a look at

node/lib/internal/blob.js

Line 628 in 54a5095

// If the wakeup was triggered by FIN (EndReadable), the DataQueue

I mean the

if (fin) continue;

I think it does not nothing, as the whole fin stuff.
So it either an artifact, that is now obsolete, that should be removed or something that is important and is just broken.
Do you remember what it was?
@pimterry may be you also have a look.