Changes to Delete an existing Category.

the response's body type changed from string to object for status 200

the security scope categories was added to the endpoint's security scheme BasicAuthentication

the security scope write_categories was added to the endpoint's security scheme OAuth2

the security scope assets was removed from the endpoint's security scheme BasicAuthentication

the security scope write_store was removed from the endpoint's security scheme OAuth2

added the optional property message to the response with the 200 status