Revert "Don't delete temporary directory unless kill_buckd succeeds"
Revert "Don't delete temporary directory unless kill_buckd succeeds"

Summary:
This reverts commit dd15dfd7275660f331e4a13a6d2d32f4340cea77.

This change made it `buck kill` to not remove `.buckd` when there is no running `buckd` process.

Reviewed By: cjhopman

fbshipit-source-id: b003279

nguyentruongtho/buck,JoelMarcey/buck,SeleniumHQ/buck,SeleniumHQ/buck,facebook/buck,kageiit/buck,zpao/buck,brettwooldridge/buck,SeleniumHQ/buck,romanoid/buck,JoelMarcey/buck,zpao/buck,SeleniumHQ/buck,rmaz/buck,brettwooldridge/buck,shs96c/buck,rmaz/buck,SeleniumHQ/buck,brettwooldridge/buck,brettwooldridge/buck,zpao/buck,romanoid/buck,brettwooldridge/buck,JoelMarcey/buck,rmaz/buck,Addepar/buck,SeleniumHQ/buck,Addepar/buck,facebook/buck,JoelMarcey/buck,rmaz/buck,zpao/buck,nguyentruongtho/buck,brettwooldridge/buck,JoelMarcey/buck,JoelMarcey/buck,SeleniumHQ/buck,JoelMarcey/buck,romanoid/buck,brettwooldridge/buck,kageiit/buck,nguyentruongtho/buck,rmaz/buck,JoelMarcey/buck,JoelMarcey/buck,Addepar/buck,JoelMarcey/buck,romanoid/buck,rmaz/buck,rmaz/buck,romanoid/buck,shs96c/buck,shs96c/buck,Addepar/buck,Addepar/buck,SeleniumHQ/buck,SeleniumHQ/buck,SeleniumHQ/buck,brettwooldridge/buck,shs96c/buck,facebook/buck,rmaz/buck,romanoid/buck,brettwooldridge/buck,romanoid/buck,facebook/buck,shs96c/buck,JoelMarcey/buck,shs96c/buck,kageiit/buck,rmaz/buck,Addepar/buck,brettwooldridge/buck,facebook/buck,shs96c/buck,shs96c/buck,nguyentruongtho/buck,Addepar/buck,shs96c/buck,nguyentruongtho/buck,nguyentruongtho/buck,SeleniumHQ/buck,kageiit/buck,Addepar/buck,shs96c/buck,brettwooldridge/buck,Addepar/buck,JoelMarcey/buck,romanoid/buck,facebook/buck,kageiit/buck,romanoid/buck,facebook/buck,kageiit/buck,Addepar/buck,brettwooldridge/buck,zpao/buck,shs96c/buck,brettwooldridge/buck,SeleniumHQ/buck,romanoid/buck,shs96c/buck,romanoid/buck,zpao/buck,rmaz/buck,rmaz/buck,Addepar/buck,SeleniumHQ/buck,kageiit/buck,romanoid/buck,Addepar/buck,Addepar/buck,zpao/buck,shs96c/buck,rmaz/buck,rmaz/buck,JoelMarcey/buck,romanoid/buck,nguyentruongtho/buck