Pytest: more post-test path cleanup (#30556)

* test cleanup

* missed this one

* remove that

* static class
old-commit-hash: 4086795c29bacd245a7cc372a16730e1a6ff974f

common/api/__init__.py

@@ -2,7 +2,7 @@ import jwt
 import os
 import requests
 from datetime import datetime, timedelta
-from openpilot.common.basedir import PERSIST
+from openpilot.system.hardware.hw import Paths
 from openpilot.system.version import get_version
 
 API_HOST = os.getenv('API_HOST', 'https://api.commadotai.com')
@@ -10,7 +10,7 @@ API_HOST = os.getenv('API_HOST', 'https://api.commadotai.com')
 class Api():
   def __init__(self, dongle_id):
     self.dongle_id = dongle_id
-    with open(PERSIST+'/comma/id_rsa') as f:
+    with open(Paths.persist_root()+'/comma/id_rsa') as f:
       self.private_key = f.read()
 
   def get(self, *args, **kwargs):