Obsolete code from #15 that was forgotten to be removed
From ea34965be31dcf7e7e30c1edb9a9fa9d18fe6b30 Mon Sep 17 00:00:00 2001
From: James Taylor <user234683@users.noreply.github.com>
Date: Sat, 3 Jul 2021 20:06:11 -0700
This feature is no longer recommended. Though some browsers might still support it,
it may have already been removed from the relevant web standards, may be in the
process of being dropped, or may only be kept for compatibility purposes.
Avoid using it, and update existing code if possible; see the compatibility table
at the bottom of this page to guide your decision.
Be aware that this feature may cease to work at any time.
More info in https://developer.mozilla.org/en-US/docs/Web/API/Document/fullscreen#Deprecated
from #15:
"[..] Firefox's VTT parsing [ignores] newlines. So if the cue starts
with a newline, that cue will have blank text (a corollary is that
the first sentence uttered will fail to display in the automatic
captions [..])."
