remove legacy AMO tasks (bug 1026255)

https://bugzilla.mozilla.org/show_bug.cgi?id=1026255

r? @robhudson @diox
we actually don't anymore. yeah, I thought we removed that a while ago, and we did.

![](http://f.cl.ly/items/2s163i1b0N1Q0v0z2q3F/Screen%20Shot%202014-06-16%20at%205.11.20%20PM.png)