It's possible that the concept of limbo — as in the border region of Hell, where in Roman Catholic theology innocent but unbaptized souls reside — will be officially consigned to oblivion. But the metaphorical extension meaning "nothingness" or "indecision" is likely here to stay:
"In a long-awaited document, the Church's International Theological Commission said limbo reflected an 'unduly restrictive view of salvation.' ...The verdict that limbo could now rest in peace had been expected for years. The document was seen as most likely the final word since limbo was never part of Church doctrine, even though it was taught to Catholics well into the 20th century."
Link: Vatican buries limbo after centuries - MSNBC.com