Migrate to pre-commit.ci [skip ci]

Author: int3l

tox.ini

@@ -3,7 +3,7 @@ envlist =
     py36
     py37
     py38
-    py39-pre-commit
+    py39
 skip_missing_interpreters = true
 
 [pytest]
@@ -18,13 +18,10 @@ deps =
 commands =
     python -bb -m pytest
 
-[testenv:py39-pre-commit]
+[testenv:py39]
 deps =
     numpy
     pandas
     -r{toxinidir}/requirements-dev.txt
 commands =
-    pre-commit run --all-files --show-diff-on-failure
     python -bb -m pytest {posargs:tests}
-passenv =
-    PY_COLORS PRE_COMMIT_COLOR