For removing an identity, there is mentioned to pass --cfg.identities.allowremove to fabric-ca-client. Should this be passed to the fabric-ca-server while starting instead of client? Also, there is no need for -b there too. (page. 58)
Yes, @maniankara you are definitely right we caught those misprints a few weeks back. The next update release to the course content includes those changes(Should be out soon).
Very good attention to detail!