Remove `num-traits` dependency #4361

Job	Run time
Test (ubuntu-latest)	1m 58s
Test (windows-latest)	4m 34s
Formatting	14s
Test (macos-latest)	1m 44s
Build	1m 59s
Documentation	37s
Check mininum supported Rust version	31s
Test (Address Sanitizer)	2m 49s
Audit	2m 34s
Clippy	1m 4s
Coverage	4m 18s
Fuzz (translate)	4m 0s
Fuzz (execute)	4m 10s
Miri	7m 24s
Miri (spec)	6m 31s
Fuzz (differential)	4m 19s
uDeps	57s
	49m 43s

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