doxygen: fix duplicated defgroup for clock #6879
| Job | Run time |
|---|---|
| 38s | |
| 1m 34s | |
| 4m 53s | |
| 4m 14s | |
| 8m 39s | |
| 6m 6s | |
| 7m 5s | |
| 6m 23s | |
| 1m 13s | |
| 7m 7s | |
| 1m 44s | |
| 5m 50s | |
| 1m 50s | |
| 1m 12s | |
| 2m 30s | |
| 6m 4s | |
| 1m 18s | |
| 3m 18s | |
| 1m 2s | |
| 3m 15s | |
| 7m 12s | |
| 1m 0s | |
| 7m 11s | |
| 10m 6s | |
| 5m 26s | |
| 1m 51s | |
| 6m 28s | |
| 33s | |
| 1h 55m 42s |