Remove path import from audit-validity-dates.py

This import is now unnecessary, as the script is in the same directory
as the module it imports in the framework submodule.

Signed-off-by: David Horstmann <david.horstmann@arm.com>

scripts/audit-validity-dates.py

@@ -28,7 +28,6 @@
 
 from generate_test_code import FileWrapper
 
-import scripts_path # pylint: disable=unused-import
 from framework_dev import build_tree
 from framework_dev import logging_util