Remove unused import for iosxr l3_interfaces (#61563)

This was caught by our ansible network collections migration script.

Signed-off-by: Paul Belanger <pabelanger@redhat.com>

lib/ansible/module_utils/network/iosxr/facts/l3_interfaces/l3_interfaces.py

@@ -17,7 +17,7 @@ __metaclass__ = type
 from copy import deepcopy
 import re
 from ansible.module_utils.network.common import utils
-from ansible.module_utils.network.iosxr.utils.utils import get_interface_type, normalize_interface
+from ansible.module_utils.network.iosxr.utils.utils import get_interface_type
 from ansible.module_utils.network.iosxr.argspec.l3_interfaces.l3_interfaces import L3_InterfacesArgs