diff --git a/pyproject.toml b/pyproject.toml
index 4a50f731..1d3dc49e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -67,13 +67,5 @@ benchmark_ci = [
     "pytest-codspeed>=4.2.0",
 ]
 
-[tool.setuptools]
-include-package-data = true
-zip-safe = false
-
-[tool.setuptools.package-data]
-grimp = ["py.typed"]
-
-[tool.setuptools.packages.find]
-where = ["src"]
-namespaces = false
+[tool.pytest.ini_options]
+xfail_strict = true
diff --git a/setup.cfg b/setup.cfg
deleted file mode 100644
index dec2c85e..00000000
--- a/setup.cfg
+++ /dev/null
@@ -1,7 +0,0 @@
-[flake8]
-extend-ignore = E731, E203
-max-line-length = 100
-exclude = */migrations/*, tests/assets/*
-
-[tool:pytest]
-xfail_strict=true
\ No newline at end of file