Waterfox: downgrading to icu-62.1_2,1 and rebuilding consumers

[Jan Beich]

Graham Perrin <grahamperrin at gmail.com> writes:

> - is this DEFAULT_VERSIONS= line correct/sufficient for
>   Thunderbird etc. to be built with the inferior version of icu?
>
> DEFAULT_VERSIONS= icu=62.1_2,1

Only one icu version is supported in the ports tree, so the above is nop.
The ports are built against whatever version is installed.