Temporarily remove pkill steps
Temporarily remove pkill steps

We should be running pkill (or the platform-specific equivalent) at the
start and end of each build, but this is really a CI detail, not
something that is integral to the list of steps, so remove it for now.

rwaweber/saltfs,UK992/saltfs,rwaweber/saltfs,servo/saltfs,ALikhachev/saltfs,ALikhachev/saltfs,UK992/saltfs,setupminimal/saltfs,rwaweber/saltfs,setupminimal/saltfs,setupminimal/saltfs,UK992/saltfs,servo/saltfs,ALikhachev/saltfs