Remove unused method in helper
Remove unused method in helper

Change-Id: Ide5a829bfefd824c48605c4d6e1a2ecc9e76b616
Signed-off-by: Grégoire Seux <139507733e92493cefa400d92b851cc35cdd02bf@criteo.com>

chef-cookbooks/iis,opscode-cookbooks/iis