[milo] remove BuilderSummary.Console
[milo] remove BuilderSummary.Console

https://chromium-review.googlesource.com/c/infra/luci/luci-go/+/772973
intended to delete BuilderSummary.Console field. It removes its usages, but
did not remove the field itself. Remove it

Bug: 782874
Change-Id: I69ca043567a4305b4028d75e962f6372cdeeff5c
Reviewed-on: https://chromium-review.googlesource.com/792533
Reviewed-by: Erik Staab <9e0728822fdb2ce07b011b42510312bb837e6a51@chromium.org>
Commit-Queue: Nodir Turakulov <ef4933a197ef7b4b3f55f1bec4942aead3637a2a@chromium.org>

luci/luci-go,luci/luci-go,luci/luci-go,luci/luci-go,luci/luci-go,luci/luci-go