Idea: Remove go-ps dependency

[martialblog]

Right now we are importing go-ps for just one reason, finding out if we run in the delve debugger.

	if parent, err := ps.FindProcess(ppid); err == nil {
		if parent.Executable() == "dlv" {

I do like to minimize dependencies as much as possible. Do we want to remove that piece of code or comment it out?

If I really really need to run delve, I can still enable it for debugging only. No need to ask the users to import it as a dependency

[martialblog]

@pdorschner @RincewindsHat What do you think?

[pdorschner]

I completely agree. It's only needed for a single case, and importing an entire package for that purpose doesn't make sense.