Remove unused setuptools config.

Maturin is the build backend now, so the old `setuptools` config has no effect.

Author: nathanjmcdougall

pyproject.toml

@@ -69,14 +69,3 @@ benchmark_ci = [
 
 [tool.pytest.ini_options]
 xfail_strict = true
-
-[tool.setuptools]
-include-package-data = true
-zip-safe = false
-
-[tool.setuptools.package-data]
-grimp = ["py.typed"]
-
-[tool.setuptools.packages.find]
-where = ["src"]
-namespaces = false