Revert "Bump Kibana instances to 2 temporarily for rebuilding instance"
Revert "Bump Kibana instances to 2 temporarily for rebuilding instance"

This reverts commit f25d648c4e1ab596e8c44fd10c83554ce7c87da0.

We don't need to increase the instance count when rebuilding this
particular instance, because the one it's replacing followed a different
convention and gets overlooked when the count is determined.

mitodl/salt-ops,mitodl/salt-ops