Remove ES infra

[melainalegaspi]

[chmreid]

is this related to HumanCellAtlas/data-store#2714?

[amarjandu]

this was supposed to be for elasticsearch @chmreid

[chmreid]

@amarjandu @kozbo @melainalegaspi This ticket is still ambiguous. Is the ticket to remove ES infra from our infra/ folder and our instructions? Or is the ticket to tear down ES infra from our current deployment in AWS once we've deprecated ES? Is this blocked by (or does it depend on) other tickets?