doc(conf): update to use importlib.metadata

doc/conf.py

 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 
+import importlib.metadata
 import os
 import time
 
-import pkg_resources
 import sphinx_rtd_theme
 
 # -- General configuration -----------------------------------------------------
@@ -38,7 +38,7 @@ nitpick_ignore = []
 # Allows the user to override warnings from a separate file
 if os.path.exists("nitpick-exceptions.txt"):
     for line in open("nitpick-exceptions.txt"):
-        if line.strip() == "" or line.startswith("#"):
+        if line.strip() == "" or line.strip().startswith("#"):
             continue
         dtype, target = line.split(None, 1)
         target = target.strip()
@@ -76,16 +76,16 @@ project = "bob.pipelines"
 copyright = "%s, Idiap Research Institute" % time.strftime("%Y")
 
 # Grab the setup entry
-distribution = pkg_resources.require(project)[0]
+distribution = importlib.metadata.version(project)
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
 # built documents.
 #
 # The short X.Y version.
-version = distribution.version
+version = distribution
 # The full version, including alpha/beta/rc tags.
-release = distribution.version
+release = distribution
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.