Not true. The electors "pledged" to Obama would be free to vote for anybody they want, including Hillary. On another thread, it was already pointed out that a similar case has already occurred (I forget the details), and that the electors voted for a number of different people, depending on their own preference.
Incorrect! When Obama is ruled ineligible, it’s like he never ran and the Electoral Vote goes to McCain 538 - 0.
http://www.rallycongress.com/constitutional-qualification/1244