remove XDeclaredButNotUsed exclusion from Nim configurations (#5595)
#14867
| Job | Run time |
|---|---|
| 35m 20s | |
| 1s | |
| 36m 1s | |
| 33m 5s | |
| 1h 38m 33s | |
| 1m 5s | |
| 1h 48m 4s | |
| 5h 12m 9s |