LibWebRTCSocket does no longer need to check for buffered data size
<rdar://problem/114810113>
Pull request: https://github.com/WebKit/WebKit/pull/17334
Committed 267634@main (2f1c609b53d2): <https://commits.webkit.org/267634@main> Reviewed commits have been landed. Closing PR #17334 and removing active labels.