CA-33440: Remove code which saved the pid of calls to storage backends since these pids could not be safely used.
CA-33440: Remove code which saved the pid of calls to storage backends since these pids could not be safely used.

We never agreed that the storage fork/exec interface supported fully asynchronous kill(). This removes some temptation.

Signed-off-by: David Scott <63c9eb0ea83039690fefa11afe17873ba8278a56@eu.citrix.com>

koushikcgit/xcp-rrdd,koushikcgit/xcp-networkd,simonjbeaumont/xcp-rrdd,sharady/xcp-networkd,djs55/squeezed,djs55/xcp-networkd,djs55/xcp-rrdd,johnelse/xcp-rrdd,johnelse/xcp-rrdd,robhoes/squeezed,simonjbeaumont/xcp-rrdd,koushikcgit/xcp-rrdd,djs55/xcp-networkd,koushikcgit/xcp-rrdd,djs55/xcp-rrdd,sharady/xcp-networkd,koushikcgit/xcp-networkd