Drop Legacy In-Cluster PostgreSQL support
Problem
After Kubernetes 1.16, Legacy In-Cluster PostgreSQL (v0.7.1
) won't be installable because the API version is too old.
This means all users using Kubernetes 1.16+ are using New In-Cluster PostgreSQL, which is channel 2.
In other words, If we can confirm that there are no users using Kubernetes 1.15 or below, we can safely drop the legacy In-Cluster PostgreSQL dependency.
Edited by Shinya Maeda