Remove setup.py completely. Requires setuptools>=64.0.0

Makefile

@@ -4,12 +4,12 @@ TESTDIR=tmp-test-dir-with-unique-name
 PYTEST_COV_ARGS=--cov=$(PROJECT) --cov-config=../pyproject.toml \
 			--cov-report=term-missing --cov-report=xml --cov-report=html \
 			--pyargs ${PYTEST_EXTRA}
-BLACK_FILES=$(PROJECT) setup.py doc/conf.py examples
+BLACK_FILES=$(PROJECT) doc/conf.py examples
 BLACKDOC_OPTIONS=--line-length 79
-DOCFORMATTER_FILES=$(PROJECT) setup.py doc/conf.py examples
+DOCFORMATTER_FILES=$(PROJECT) doc/conf.py examples
 DOCFORMATTER_OPTIONS=--recursive --pre-summary-newline --make-summary-multi-line --wrap-summaries 79 --wrap-descriptions 79
-FLAKE8_FILES=$(PROJECT) setup.py doc/conf.py examples
-LINT_FILES=$(PROJECT) setup.py doc/conf.py
+FLAKE8_FILES=$(PROJECT) doc/conf.py examples
+LINT_FILES=$(PROJECT) doc/conf.py
 
 help:
 	@echo "Commands:"

doc/maintenance.md

@@ -167,7 +167,7 @@ alongside the rest of the Scientific Python ecosystem, and therefore supports:
 * All minor versions of NumPy released in the 24 months prior to the project,
   and at minimum the last three minor versions.
 
-In `setup.py`, the `python_requires` variable should be set to the minimum
+In `pyproject.toml`, the `requires-python` key should be set to the minimum
 supported version of Python. Minimum Python and NumPy version support should be
 adjusted upward on every major and minor release, but never on a patch release.
 

pyproject.toml

@@ -1,5 +1,5 @@
 [build-system]
-requires = ["setuptools>=61", "setuptools_scm[toml]>=6.2"]
+requires = ["setuptools>=64", "setuptools_scm[toml]>=6.2"]
 build-backend = "setuptools.build_meta"
 
 [project]