DOC: Fix release steps numbering, remove old doc (#3423) #1151

Job	Run time
Code style checks	18s
PEP 517	23s
Security audit	26s
Python 3.11 with coverage checking, all deps, and remote data	33m 21s
OS X - Python 3.12	10m 25s
Windows - Python 3.10	20m 32s
Linux - Python 3.13	14m 22s
Python 3.13 with latest dev versions of key dependencies, and remote data	31m 37s
Python 3.11 with stable versions of dependencies and Roman	13m 13s
Upload Coverage	5s
	2h 4m 42s

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