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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _RemoveAuthorizedKeys(self, user):
 """Remove a Linux user account's authorized keys file to prevent login. Args: user: string, the Linux user account to remove access. """

    pw_entry = self._GetUser(user)
    if not pw_entry:
      return

    home_dir = pw_entry.pw_dir
    authorized_keys_file = os.path.join(home_dir, '.ssh', 'authorized_keys')
    if os.path.exists(authorized_keys_file):
      try:
        os.remove(authorized_keys_file)
      except OSError as e:
        message = 'Could not remove authorized keys for user %s. %s.'
        self.logger.warning(message, user, str(e))