Use AnnotationMirrorSet and remove usage of Set<AnnotationMirror>
#712
| Job | Run time |
|---|---|
| 3m 56s | |
| 5m 55s | |
| 5m 59s | |
| 4m 27s | |
| 6m 3s | |
| 5m 59s | |
| 4m 20s | |
| 5m 52s | |
| 6m 7s | |
| 4m 26s | |
| 5m 59s | |
| 6m 15s | |
| 1h 5m 18s |