[MC-8541] Beds can't be broken in adventure mode

Reproducible using creative to get the bed item. Then switch to adventure.

1. Place the bed
2. Try to remove

Minecraftwiki says it can be broken w/ any tool.

Linked issues

Mustek 2013-01-27T20:10:59Z

Adventure mode is different, you need the assigned tool. Since the bed is wood, you'll need an axe.

alef 2013-01-27T21:49:38Z

It doesn't work with any of:

1. Sword
2. Axe
3. Shovel
4. Pickaxe

kumasasa 2013-01-27T21:52:40Z

Confirmed.
No tool, sword or hand can destroy a bed.

kumasasa 2013-01-27T22:23:33Z

Resolved as duplicate of MC-2789 - there are all unbreakable blocks summarized.