Matt Bostock 78715e4182 Alerts template: remove silence table header
There's no corresponding table column for this table header. The
placeholder link for silences was removed in e8800730.

Accordingly, regenerate `web/ui/bindata.go` by running:

    make assets format
2016-07-26 21:33:21 +01:00
..
2016-01-11 15:18:39 +01:00