billing classification in AX? how to deactive retail, public sector?

I noticed in the featurepack AX that when I created a freetext invoice, it require me to input billing classification? Is it part of public sector functionality. If so, how could I deactivate? I also see Retail?

Go to system administration → Setup → Licensing → License configuration.

Disable the configuration for retail and public sector.

Now open License information. In the feature sets tab, delete the License code for public sector.

Synchronize the database and see if the billing classification is removed or not. Take help of developer if you have any confusion.