From 4a06de96585dad1c8497e4fd01d4041ee2c210b4 Mon Sep 17 00:00:00 2001
From: Brett Graham <brettgraham@gmail.com>
Date: Tue, 14 Nov 2023 15:19:39 -0500
Subject: [PATCH] remove use of pkg_resources (#217)

---
 src/stdatamodels/fits_support.py | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/src/stdatamodels/fits_support.py b/src/stdatamodels/fits_support.py
index d00e91a8..c964c9ab 100644
--- a/src/stdatamodels/fits_support.py
+++ b/src/stdatamodels/fits_support.py
@@ -3,7 +3,6 @@
 import hashlib
 import inspect
 import io
-from pkg_resources import parse_version
 import re
 import warnings
 import weakref
@@ -38,9 +37,6 @@
 _FITS_SOURCE_PREFIX = "fits:"
 _NDARRAY_TAG = "tag:stsci.edu:asdf/core/ndarray-1.0.0"
 
-_ASDF_GE_2_6 = parse_version(asdf.__version__) >= parse_version('2.6')
-
-
 _builtin_regexes = [
     '', 'NAXIS[0-9]{0,3}', 'BITPIX', 'XTENSION', 'PCOUNT', 'GCOUNT',
     'EXTEND', 'BSCALE', 'BZERO', 'BLANK', 'DATAMAX', 'DATAMIN',
@@ -372,10 +368,7 @@ def datetime_callback(node, json_id):
 
     tree = treeutil.walk_and_modify(tree, datetime_callback)
 
-    if _ASDF_GE_2_6:
-        kwargs = {"_visit_repeat_nodes": True}
-    else:
-        kwargs = {}
+    kwargs = {"_visit_repeat_nodes": True}
 
     validators, context = _get_validators(hdulist)
     validator = asdf_schema.get_validator(schema, None, validators, **kwargs)