code: def _remove_namespace(self, namespace):
          
  
          if namespace is None:
              raise ValueError("Namespace argument must not be None")
  
          # Normalize the namespace name
          namespace = namespace.strip('/')
  
          if namespace not in self.namespaces:
              raise CIMError(
                  CIM_ERR_NOT_FOUND,
                  _format("Namespace {0!A} does not exist in the mock "
                          "repository", namespace))
  
          if not self._class_repo_empty(namespace) or \
                  not self._instance_repo_empty(namespace) or \
                  not self._qualifier_repo_empty(namespace):
              raise CIMError(
                  CIM_ERR_NAMESPACE_NOT_EMPTY,
                  _format("Namespace {0!A} is not empty", namespace))
  
          if namespace == self.default_namespace:
              raise CIMError(
                  CIM_ERR_NAMESPACE_NOT_EMPTY,
                  _format("Connection default namespace {0!A} cannot be "
                          "deleted from mock repository", namespace))
  
          del self.namespaces[namespace]
docs: Remove a CIM namespace from the mock repository.
  
          The namespace must exist in the mock repository and must be empty.
  
          The default connection namespace cannot be removed.
  
          Parameters:
  
            namespace (:term:`string`):
              The name of the CIM namespace in the mock repository. Must not be
              `None`. Any leading and trailing slash characters are split off
              from the provided string.
  
          Raises:
  
            ValueError: Namespace argument must not be None
            CIMError: CIM_ERR_NOT_FOUND if the namespace does not exist in
              the mock repository.
            CIMError: CIM_ERR_NAMESPACE_NOT_EMPTY if the namespace is not empty.
            CIMError: CIM_ERR_NAMESPACE_NOT_EMPTY if the default connection
              namespace was attempted to be deleted.