[webvtt] Drop "the min-height property must be set to 0px"

zcorpan has just created a new issue for 
https://github.com/w3c/webvtt:

== Drop "the min-height property must be set to 0px" ==
https://w3c.github.io/webvtt/#applying-css-properties

> the min-height property must be set to 0px

0 is the initial value for min-height, so this can be dropped with no 
normative change.

See https://github.com/w3c/webvtt/issues/241

Received on Thursday, 5 November 2015 13:51:58 UTC