ipfx/x_to_nwb/conversion_utils.py: Avoid using the pkg_resources module

This is removed in python 3.12. And we can also directly use __version__.

Author: t-b

ipfx/x_to_nwb/conversion_utils.py

@@ -4,7 +4,6 @@
 """
 
 import math
-from pkg_resources import get_distribution, DistributionNotFound
 import os
 from subprocess import Popen, PIPE
 
@@ -143,10 +142,7 @@ def get_git_version():
 
         return f"({branch}) {rev}"
 
-    try:
-        package_version = get_distribution('ipfx').version
-    except DistributionNotFound:  # not installed as a package
-        package_version = None
+    package_version = __version__
 
     try:
         git_version = get_git_version()