Remove clvm-traits and bump chia-bls #1629

Job	Run time
Wheel on macos-latest py-3.7	2m 1s
Wheel on ubuntu-latest py-3.7	2m 26s
Wheel on windows-latest py-3.7	3m 48s
Checks	43s
coverage	7m 26s
Run fuzz targets (macos-latest, 3.7)	46m 10s
Unit tests (macos-latest, 3.7)	9m 3s
Run fuzz targets (ubuntu-latest, 3.7)	24m 40s
Unit tests (ubuntu-latest, 3.7)	3m 0s
Unit tests (windows-latest, 3.7)	6m 20s
Upload to PyPI	18s
	1h 45m 55s

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