code: public Response remove(DesignDocument designDocument) {
          assertNotEmpty(designDocument, "DesignDocument");
          ensureDesignPrefixObject(designDocument);
          return db.remove(designDocument);
      }
docs: Removes a design document using DesignDocument object from the database.
  
  @param designDocument the design document object to be removed
  @return {@link DesignDocument}