Use "wave" for import test

smptd and chunk are deprecated in various python versions.

tests/test_packages.py

@@ -20,7 +20,6 @@
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 import os
-import sys
 import unittest
 from collections.abc import Mapping
 
@@ -120,21 +119,12 @@ def testPackages(self):
         self.assertDictEqual(new.extra(packages), {})
 
         # Now load an obscure python package and the list of packages should
-        # change
-        # Shouldn't be used by anything we've previously imported
-        # smtpd can be used on 3.8 since it does have a version string but
-        # it is also a deprecated package so should not be used in tests
-        # for python 3.10 and newer.
-        # chunk does not have a version string but is handled as a stdlib
-        # package on 3.10 and newer.
-        if sys.version_info < (3, 10, 0):
-            import smtpd  # noqa: F401
-
-            new_package = "smtpd"
-        else:
-            import chunk  # noqa: F401
-
-            new_package = "chunk"
+        # change. Shouldn't be used by anything we've previously imported and
+        # preferably should not be a deprecated package.
+        new_package = "wave"
+        self.assertNotIn(new_package, packages)
+
+        import wave  # noqa: F401
 
         new = lsst.utils.packages.Packages.fromSystem()
         self.assertDictEqual(packages.difference(new), {})  # No inconsistencies