Bug 1360198 - don't set expiry for generic-worker task artifacts,r=dustin

taskcluster/taskgraph/transforms/task.py

@@ -921,7 +921,9 @@ def build_generic_worker_payload(config, task, task_def):
         a = {
             'path': artifact['path'],
             'type': artifact['type'],
-            'expires': task_def['expires'],  # always expire with the task
+            # let's not explicitly set here, as this is the default anyway
+            # and the Task Creator will not refresh these timestamps
+            # 'expires': task_def['expires'],  # always expire with the task
         }
         if 'name' in artifact:
             a['name'] = artifact['name']