Yes it actually happened.
Bloodbraid Elf and Seething Song are banned.
Magic Online Pauper
Empty the Warrens, Grapeshot, and Invigorate are banned.
Eric Lauer, one of the lead Magic developers, explains the bannings in an article over at the Mothership. To summarize briefly, Bloodbraid Elf was banned because WOTC wanted more diversity in the format and with Jund taking down the last couple of Grand Prix tournaments, they decided to axe a card that was unique to Jund. Storm was banned because they did not want frequent turn 3 kills to be possible in the format.
For Erik Lauer’s complete explanation on the B&R changes, click here!