[GRASS-git] [OSGeo/grass] 0140b9: pythonlib: Enable unused var warning (#1509)

[Vaclav Petras]

  Branch: refs/heads/master
  Home:   https://github.com/OSGeo/grass
  Commit: 0140b987a5004672125a4fe5bde295dfe440863c
      https://github.com/OSGeo/grass/commit/0140b987a5004672125a4fe5bde295dfe440863c
  Author: Vaclav Petras <wenzeslaus at gmail.com>
  Date:   2021-04-10 (Sat, 10 Apr 2021)

  Changed paths:
    M python/grass/.flake8
    M python/grass/imaging/images2gif.py
    M python/grass/imaging/images2swf.py
    M python/grass/script/core.py

  Log Message:
  -----------
  pythonlib: Enable unused var warning (#1509)

Ignore whole temporal subpackage.
Remove unused in imaging including some Python 2 support (and fix a typo).
Disable unused var warning inline for start_command and link the issue.