Fix readthedocs build

Author: rhpvorderman

docs/conf.py

@@ -4,26 +4,19 @@
 # list see the documentation:
 # https://www.sphinx-doc.org/en/master/usage/configuration.html
 
-from distutils.dist import DistributionMetadata
-from pathlib import Path
-
-import pkg_resources
+import zlib_ng
 
 # -- Project information -----------------------------------------------------
 
-# Get package information from the installed package.
-package = pkg_resources.get_distribution("zlib-ng")
-metadata_file = Path(package.egg_info) / Path(package.PKG_INFO)
-metadata = DistributionMetadata(path=str(metadata_file))
-
 project = 'python-zlib-ng'
 copyright = '2023, Leiden University Medical Center'
 author = 'Leiden University Medical Center'
 
+
 # The short X.Y version
-version = package.parsed_version.base_version
+version = zlib_ng.__version__
 # The full version, including alpha/beta/rc tags
-release = package.version
+release = zlib_ng.__version__
 
 
 # -- General configuration ---------------------------------------------------

requirements-docs.txt

@@ -1,4 +1,4 @@
 sphinx
 setuptools
-sphinx-rtd-theme>=1.2.0rc3,<1.3
+sphinx-rtd-theme
 sphinx-argparse