Remove step_name from telemetry_gpu_integration_test's test_id_prefix

Bug: 1101456
Change-Id: Ia2c80d9da14ff04a5bd21c1e84c57c751b291f70
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2286029
Reviewed-by: Brian Sheedy <[email protected]>
Reviewed-by: Yuly Novikov <[email protected]>
Reviewed-by: Nodir Turakulov <[email protected]>
Commit-Queue: Chan Li <[email protected]>
Cr-Commit-Position: refs/heads/master@{#787023}
diff --git a/testing/buildbot/generate_buildbot_json.py b/testing/buildbot/generate_buildbot_json.py
index 8631924..e0842935 100755
--- a/testing/buildbot/generate_buildbot_json.py
+++ b/testing/buildbot/generate_buildbot_json.py
@@ -894,7 +894,7 @@
     gn_entry = (
         self.gn_isolate_map.get(result['isolate_name']) or
         self.gn_isolate_map.get('telemetry_gpu_integration_test'))
-    result['test_id_prefix'] = 'ninja:%s/%s/' % (gn_entry['label'], step_name)
+    result['test_id_prefix'] = 'ninja:%s/' % gn_entry['label']
 
     args = result.get('args', [])
     test_to_run = result.pop('telemetry_test_name', test_name)