Revert "Add the fork manager code (related to previous patch)."

This reverts commit adb1719fe8bd61b2537e84ffdc7b5ffac2f68620.
Revert "This patch makes Ansible reuse fork allocation between seperate instantations of the runner API, therefore the overhead of recreating forks"

This reverts commit 85d66b9a0c87849c7a83099141e5b2b4731abbe5.