Remove pyproject.toml

pyproject.toml

@@ -1,7 +0,0 @@
-# See https://setuptools.readthedocs.io/en/latest/build_meta.html
-
-[build-system]
-# Use setuptools >= 43 because it automatically includes pyproject.toml in source distribution
-# Use setuptools >= 46.5 to use attr: package.__version__
-# https://setuptools.readthedocs.io/en/latest/history.html#id284
-requires = ["setuptools", "wheel"]