It is a legal requirement for companies to display their company contact information (registered company number, address, telephone, email). Most sites want to provide at least one contact address.
At the moment you have to use a plugin for this and it isn't compatible with v3.0.
Could you consider adding a new fieldset for "Public Contact Info" to the General Settings? With short tags that can be added to headers, footers and the contact us page if required?
Note, that the details wouldn't necessarily be the same as the admin contact info.