Revert "Add  "parallel: true" to circle.yml"
Revert "Add  "parallel: true" to circle.yml"

This reverts commit 5ae2d5562a53486c44b5c165a95c1d6f08f826cb.

xxorde/pgglaskugel,xxorde/pgglaskugel,DaniloE/pgglaskugel,xxorde/pgglaskugel