Revert "Monitor etcd via http health check"

This reverts commit d8e25c03ded5a970617ec37ac1345372631691ac.

We're doing this because we're iceboxing [#75493344] temporarily and we're not
sure if the timeout in the original commit is for the entire process being up
or for each request to the stats endpoint

Signed-off-by: Sheel Choksi <sheelc@pivotallabs.com>