fixed ISSUE-42775: Remove ant task package.core (mercurial only and unused)
That task tied to mercurial revision control (by using hg id & hg archive, so for upcoming git migration it will stop working). Apart it is not used by Openbravo to prepare releases so not really needed.
Instead of rewriting it with git or hg & git logic lets remove it.
Wiki documentation updated already here (stop mentioning the task) http://wiki.openbravo.com/w/index.php?title=Development_Build_Tasks&action=historysubmit&diff=250016&oldid=240105