[faiproject/fai] cb9eda: fix syntax error

[Mrfai]

  Branch: refs/heads/master
  Home:   https://github.com/faiproject/fai
  Commit: cb9eda59e88e570f8478bf749fbca1d73757b915
      https://github.com/faiproject/fai/commit/cb9eda59e88e570f8478bf749fbca1d73757b915
  Author: Thomas Lange <lange at debian.org>
  Date:   2021-07-03 (Sat, 03 Jul 2021)

  Changed paths:
    M bin/fai-diskimage

  Log Message:
  -----------
  fix syntax error


  Commit: 21932b35604e1eb1af5114a3176c48bc668c85ae
      https://github.com/faiproject/fai/commit/21932b35604e1eb1af5114a3176c48bc668c85ae
  Author: Thomas Lange <lange at debian.org>
  Date:   2021-07-03 (Sat, 03 Jul 2021)

  Changed paths:
    M bin/fai-diskimage
    M lib/subroutines

  Log Message:
  -----------
  do not remove VGs, deactivate them, Closes: #990633


Compare: https://github.com/faiproject/fai/compare/cbf8b0d7e619...21932b35604e