In https://github.com/puppetlabs/puppet/pull/2086/files#diff-f9fc191a659f726148aafaef592ee558R125 the only thing we're doing is deleting a section from the inifile, so we can just make an expectation that `#section` is invoked with the right arguments and call it a day. As it stands we're stubbing out reposdir and `File.directory?`, neither of which are actually located in this code.