Simplify isort and flake8 configs

.flake8

@@ -14,3 +14,5 @@ exclude =
   ./venv*
   .eggs/
   ./acsoo/templates/**
+per-file-ignores=
+    __init__.py:F401

.isort.cfg

@@ -1,9 +1,2 @@
 [settings]
-; see https://github.com/ambv/black
-multi_line_output=3
-include_trailing_comma=True
-force_grid_wrap=0
-combine_as_imports=True
-use_parentheses=True
-line_length=88
-known_third_party = appdirs,click,httpx,pkg_resources,pylint,pytest,setuptools
+profile = black

.pre-commit-config.yaml

@@ -27,18 +27,10 @@ repos:
     name: flake8 except __init__.py
     exclude: /__init__\.py$
     additional_dependencies: ["flake8-bugbear==20.1.4"]
-  - id: flake8
-    name: flake8 only __init__.py
-    args: [--extend-ignore=F401]  # ignore imported unused in __init__.py
-    files: __init__.py
 - repo: https://github.com/asottile/pyupgrade
   rev: v2.31.0
   hooks:
   - id: pyupgrade
-- repo: https://github.com/asottile/seed-isort-config
-  rev: v2.2.0
-  hooks:
-  - id: seed-isort-config
 - repo: https://github.com/pre-commit/mirrors-isort
   rev: v5.10.1
   hooks: