Use AnnotationMirrorSet and remove usage of Set<AnnotationMirror>
#708
| Job | Run time |
|---|---|
| 4m 45s | |
| 6m 27s | |
| 6m 34s | |
| 4m 1s | |
| 6m 26s | |
| 6m 35s | |
| 3m 51s | |
| 6m 21s | |
| 7m 11s | |
| 4m 4s | |
| 6m 30s | |
| 6m 34s | |
| 1h 9m 19s |