Trim issue-number references from test docstrings

Per AGENTS.md: those belong in the PR description, not code comments,
since they rot as the codebase evolves.

netbox/dcim/tests/test_api.py

@@ -1208,9 +1208,9 @@ class RackTypeTestCase(APIViewTestCases.APIViewTestCase):
 
     def test_form_factor_required(self):
         """
-        Regression test for #23154: form_factor must be reported as required by
-        OPTIONS, and a POST omitting it must be rejected with a normal "required"
-        validation error rather than a model-level "cannot be blank" error.
+        form_factor must be reported as required by OPTIONS, and a POST omitting it
+        must be rejected with a normal "required" validation error rather than a
+        model-level "cannot be blank" error.
         """
         self.add_permissions('dcim.add_racktype')
 

netbox/vpn/tests/test_api.py

@@ -603,9 +603,9 @@ class L2VPNTestCase(APIViewTestCases.APIViewTestCase):
 
     def test_type_required(self):
         """
-        Regression test for #23154: type must be reported as required by OPTIONS,
-        and a POST omitting it must be rejected with a normal "required" validation
-        error rather than a model-level "cannot be blank" error.
+        type must be reported as required by OPTIONS, and a POST omitting it must
+        be rejected with a normal "required" validation error rather than a
+        model-level "cannot be blank" error.
         """
         self.add_permissions('vpn.add_l2vpn')