An outdated occupation, just like
haberdasher, miliner or blacksmith.
In mediaeval times, every website had a
Webmaster who used his mystical computing powers to keep all the flashing text, unreadable links and "under construction" signs safely in place.
These days people have found other ways of making websites work, and the last use of the word "
webmaster" happened on
Geocities some time in 2004.