lint: stop ignoring LIEF imports

Type stubs are now available as of 0.13.0.
See https://github.com/lief-project/LIEF/issues/650.

contrib/devtools/test-security-check.py

@@ -5,7 +5,7 @@
 '''
 Test script for security-check.py
 '''
-import lief #type:ignore
+import lief
 import os
 import subprocess
 from typing import List