[anim] clean-up seemingly useless line + add comment
[anim] clean-up seemingly useless line + add comment

ProgRT/deck.js,twitwi/deck.js,twitwi/deck.js,alexjobs/deck.js-1,alexjobs/deck.js-1,ProgRT/deck.js,ProgRT/deck.js,alexjobs/deck.js-1,twitwi/deck.js