Nero travelled back in time which created a new timeline (Star Trek 2009 movie). The same thing happened when Vosk travelled back in time (Star Trek: Enterprise season 4).
When time machine of Vosk was destroyed by Enterprise NX-01, the original timeline was restored. Similarly, by destroying the black hole (using which Nero came to 23rd century), can original timeline be restored?
No, because the 2009 Timeline is not an alternate timeline from the perspective of the viewers (us). The previous timeline still exists (and if anyone cared to make movies, or television series there) the only difference would be Spock, as we know him is listed as missing or dead.
This new timeline is simply a timeline where we are viewing this new Federation rather than the old one. A convenient way of allowing the franchise to go backward in time (with new faces but old names) and start all over again. They don't have to do any heavy lifting with selling people on a working franchise, only on dealing with new faces.
I'd have to watch it again, but I thought Nero's (and, later, Spock's) ship came through a wormhole, which was a temporary phenomenon; there's nothing to destroy. Said wormhole was technobabbled into existence by Spock and his magic Rambaldi red matter device.
It's not clear to me whether this new timeline replaces the old one; I think the intent is that this universe exists in parallel to the "original" universe, like the goatee universe from TOS and ENT or the multiple parallel universes Worf passed through in TNG.
