Nah, it was scrapped ages ago. Now the same rules apply as for example throw ins or free kicks, ie no set time limit.
Incorrect - The 6 second rule still exists in the LOTG.
Rarely, if ever called, because of the fact that it results in an IFK from within the penalty area....and referee's don't want to call those.
Happened in a match between Zambia and Norway a few months ago actually, confused as fuck why the ref blew at first until I remembered that rule actually still exists.