According to this question and the link in the answer from Jacob Edwards closed duplicates that have no answers will redirect the user automatically to the main post after the dupe is closed.
This gets us to a point where we all wanted to be, its a nice implemented feature that should be considered useful to the site, but it leads us to discuss 2 points:
Should the moderators in their all mighty wisdom and powerful knowledge (and by that I mean the flip a coin, make a decision method) delete any answers that might not add any information, or are simply bad answers (only links, low info, one liners, etc) before closing the post?
What if the answers have 1 or more up votes? Would your opinion still apply? Even if the answer does not really bring anything new compared with the ones on the main post?
Please read carefully the meta post linked in the answer from Jacob and share your opinion, this will be useful to allow moderators to act based on these points.