Delete TransportCallbacks and use RequestHandler trait instead
#3776
| Job | Run time |
|---|---|
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| 7m 8s | |
| 2m 42s | |
| 7m 0s | |
| 5m 19s | |
| 3m 32s | |
| 3m 32s | |
| 4m 8s | |
| 3m 5s | |
| 46m 36s |