In preparation for elastic/elasticsearch#2957, I found we have things both in the root level
dev-tools, as well as elasticsearch/x-dev-tools. Most of this stuff can
be removed as it had to do with the old manual release process. There
was also a signed license file checked in. I removed it here, we really
should not have licenses checked in IMO, and it is unclear what the
purpose of this license was for. The two remaining scripts were moved to
the root dev-tools.
Original commit: elastic/x-pack-elasticsearch@3e24ea2d56
Ryan Ernst