Removing `run-tests.py` mentions #11122

Job	Run time
Doctests (ubuntu-latest / Python 3.11)	3m 24s
Example scripts (ubuntu-latest / Python 3.12)	13m 38s
Tests (ubuntu-latest / Python 3.9)	30m 22s
Example notebooks (ubuntu-latest / Python 3.12)	20m 41s
Tests (ubuntu-latest / Python 3.10)	30m 22s
Tests (ubuntu-latest / Python 3.11)	27m 31s
style	28s
Tests (ubuntu-latest / Python 3.12)	30m 20s
Tests (macos-13 / Python 3.9)	24m 9s
Tests (macos-13 / Python 3.10)	28m 9s
Tests (macos-13 / Python 3.11)	25m 3s
Tests (macos-13 / Python 3.12)	20m 16s
Tests (macos-14 / Python 3.9)	6m 10s
Tests (macos-14 / Python 3.10)	13m 23s
Tests (macos-14 / Python 3.11)	16m 16s
Tests (macos-14 / Python 3.12)	10m 2s
Tests (windows-latest / Python 3.9)	30m 4s
Tests (windows-latest / Python 3.10)	30m 12s
Tests (windows-latest / Python 3.11)	30m 14s
Tests (windows-latest / Python 3.12)	27m 39s
	6h 58m 23s

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