gifn-apply: drop the flake8 test environment

Ruff does that now

Change-Id: I00941fac3dc46cb77003eb4691a19f23590e87e8
diff --git a/tools/git-if-needed/setup.cfg b/tools/git-if-needed/setup.cfg
deleted file mode 100644
index a3d4abf..0000000
--- a/tools/git-if-needed/setup.cfg
+++ /dev/null
@@ -1,6 +0,0 @@
-# SPDX-FileCopyrightText: StorPool <support@storpool.com>
-# SPDX-License-Identifier: BSD-2-Clause
-
-[flake8]
-max_line_length = 100
-extend_ignore = E203
diff --git a/tools/git-if-needed/tox.ini b/tools/git-if-needed/tox.ini
index 4ab9aff..fc858e4 100644
--- a/tools/git-if-needed/tox.ini
+++ b/tools/git-if-needed/tox.ini
@@ -7,7 +7,6 @@
   ruff
   ruff-all
   black
-  pep8
   mypy
   pylint
   unit-tests
@@ -38,15 +37,6 @@
 commands =
   black -- {[defs]pyfiles}
 
-[testenv:pep8]
-skip_install = True
-tags =
-  check
-deps =
-  flake8 >= 6, < 7
-commands =
-  flake8 -- {[defs]pyfiles}
-
 [testenv:mypy]
 skip_install = True
 tags =