[ci] Replace tox CI job with pre-commit

tox and pre-commit have distinct use cases, for instance tox is good for
running tests against a variety of Python versions. But it seems like
rpminspect only uses it for linting, so I ripped it out in favor of
pre-commit so that the linting process is the same on the developer side
and on the CI side.

Signed-off-by: Evan Goode <[email protected]>

Author: evan-goode

.github/workflows/pre-commit.yml

@@ -0,0 +1,14 @@
+name: pre-commit
+
+on:
+    pull_request:
+    push:
+        branches: [main]
+
+jobs:
+    pre-commit:
+        runs-on: ubuntu-latest
+        steps:
+            - uses: actions/checkout@v3
+            - uses: actions/setup-python@v3
+            - uses: pre-commit/[email protected]

.github/workflows/python.yml

@@ -11,4 +11,3 @@ repos:
       rev: 6.1.0
       hooks:
           - id: flake8
-            args: ["--extend-ignore=E501"]

.pre-commit-config.yaml

@@ -1,30 +1,5 @@
-[tox]
-envlist = flake8,format
-skipsdist=True
-
-[testenv]
-# Fiddle with the base python definitions so the Github CI matrix works neatly
-basepython =
-    py3.8: python3.8
-    py38: python3.8
-sitepackages = False
-
-[testenv:flake8]
-basepython = python3.8
-deps =
-    flake8 == 6.1.0
-commands =
-    python -m flake8 {posargs}
-
-[testenv:format]
-basepython = python3.8
-deps =
-    black == 23.9.1
-commands =
-    python -m black --check --diff {posargs:.}
-
 [flake8]
 basepython = python3.8
 show-source = True
-max-line-length = 100
 exclude = .git,.tox,dist,*egg,contrib/
+extend-ignore = E501