Remove dead code in dcos_installer.util
Remove dead code in dcos_installer.util

amitaekbote/dcos,lingmann/dcos,branden/dcos,xinxian0458/dcos,darkonie/dcos,dcos/dcos,amitaekbote/dcos,mesosphere-mergebot/dcos,asridharan/dcos,vishnu2kmohan/dcos,branden/dcos,jeid64/dcos,vishnu2kmohan/dcos,surdy/dcos,darkonie/dcos,GoelDeepak/dcos,mesosphere-mergebot/dcos,branden/dcos,jeid64/dcos,jeid64/dcos,mellenburg/dcos,amitaekbote/dcos,xinxian0458/dcos,mellenburg/dcos,mnaboka/dcos,asridharan/dcos,dcos/dcos,mesosphere-mergebot/dcos,mesosphere-mergebot/mergebot-test-dcos,mellenburg/dcos,xinxian0458/dcos,kensipe/dcos,darkonie/dcos,darkonie/dcos,mesosphere-mergebot/dcos,GoelDeepak/dcos,BenWhitehead/dcos,mnaboka/dcos,lingmann/dcos,jeid64/dcos,asridharan/dcos,kensipe/dcos,darkonie/dcos,mnaboka/dcos,mellenburg/dcos,surdy/dcos,amitaekbote/dcos,BenWhitehead/dcos,dcos/dcos,surdy/dcos,lingmann/dcos,kensipe/dcos,dcos/dcos,dcos/dcos,xinxian0458/dcos,GoelDeepak/dcos,mnaboka/dcos,BenWhitehead/dcos,mesosphere-mergebot/mergebot-test-dcos,vishnu2kmohan/dcos,surdy/dcos,branden/dcos,mesosphere-mergebot/mergebot-test-dcos,vishnu2kmohan/dcos,asridharan/dcos,mesosphere-mergebot/mergebot-test-dcos,kensipe/dcos,BenWhitehead/dcos,GoelDeepak/dcos,mnaboka/dcos,lingmann/dcos