Remove usage of pkg_resources in docs/conf.py (psf#4251)

docs/conf.py

@@ -15,10 +15,9 @@
 
 import os
 import string
+from importlib.metadata import version
 from pathlib import Path
 
-from pkg_resources import get_distribution
-
 CURRENT_DIR = Path(__file__).parent
 
 
@@ -43,7 +42,7 @@ def make_pypi_svg(version: str) -> None:
 
 # Autopopulate version
 # The version, including alpha/beta/rc tags, but not commit hash and datestamps
-release = get_distribution("black").version.split("+")[0]
+release = version("black").split("+")[0]
 # The short X.Y version.
 version = release
 for sp in "abcfr":