small perf imrpovements

src/backend/InvenTree/plugin/base/integration/ScheduleMixin.py

@@ -200,7 +200,7 @@ class ScheduleMixin:
         try:
             from django_q.models import Schedule
 
-            for key, _ in self.scheduled_tasks.items():
+            for key in self.scheduled_tasks:
                 task_name = self.get_task_name(key)
 
                 try:

src/backend/InvenTree/stock/test_migrations.py

@@ -200,7 +200,7 @@ class TestTestResultMigration(MigratorTestCase):
                 )
 
                 # Create some test results
-                for _k, v in self.test_keys.items():
+                for v in self.test_keys.values():
                     StockItemTestResult.objects.create(
                         stock_item=si, test=v, result=True, value=f'Result: {ii} : {jj}'
                     )