Revert "Temporarily ignore sys-usb selinux check"

This reverts commit af833fe.
The test should no longer be skipped since SELinux is expected to be
enabled again.

Author: deeplow

tests/base.py

@@ -2,7 +2,6 @@
 import subprocess
 import unittest
 
-import pytest
 from qubesadmin import Qubes
 
 # Reusable constant for DRY import across tests
@@ -221,8 +220,6 @@ def test_vm_config_keys(self, qube):
 
     def test_lsm_enabled(self, qube):
         """Check that the expected LSM is enabled"""
-        if qube.name == "sys-usb":
-            pytest.skip("Temporarily skipped due qubes-issues#1369")
         if qube.linux_security_modules == "apparmor":
             assert qube.package_is_installed("apparmor")
             # returns error code if AppArmor not enabled