gifn-apply: drop the flake8 test environment

Ruff does that now

Change-Id: I00941fac3dc46cb77003eb4691a19f23590e87e8
2 files changed
tree: 4fc5455f4b976c91c70d58ffc6dea6924e8c303e
  1. .gitreview
  2. patches/
  3. tools/