docs: def remove_role(self, databaseName, roleName, collectionName=None):
          """Remove one role
          
          Args:
              databaseName (str): Database Name
              roleName (RoleSpecs): role
              
          Keyword Args:
              collectionName (str): Collection
          """
          role = {"databaseName" : databaseName,
                  "roleName" : roleName}
          
          if collectionName:
              role["collectionName"] = collectionName
          
          if role in self.roles:
              self.roles.remove(role)