Remove unneeded del development dependency (#355)
#1338
| Job | Run time |
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| 48s | |
| 4m 36s | |
| 1m 23s | |
| 7m 43s | |
| 1m 24s | |
| 3m 20s | |
| 1m 26s | |
| 4m 41s | |
| 1m 21s | |
| 4m 51s | |
| 1m 27s | |
| 1m 17s | |
| 3m 5s | |
| 2m 57s | |
| 3m 32s | |
| 0s | |
| 43m 51s |