Remove unused variables and fix linter nits.
Remove unused variables and fix linter nits.

Reviewed By: philipjameson

fbshipit-source-id: 385fc60

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