Removing `run-tests.py` mentions #11123

Job	Run time
Doctests (ubuntu-latest / Python 3.11)	3m 19s
Example scripts (ubuntu-latest / Python 3.12)	13m 28s
Example notebooks (ubuntu-latest / Python 3.12)	20m 8s
Tests (ubuntu-latest / Python 3.9)	31m 23s
style	26s
Tests (ubuntu-latest / Python 3.10)	30m 42s
Tests (ubuntu-latest / Python 3.11)	27m 2s
Tests (ubuntu-latest / Python 3.12)	34m 32s
Tests (macos-13 / Python 3.9)	32m 4s
Tests (macos-13 / Python 3.10)	31m 49s
Tests (macos-13 / Python 3.11)	25m 48s
Tests (macos-13 / Python 3.12)	27m 10s
Tests (macos-14 / Python 3.9)	14m 52s
Tests (macos-14 / Python 3.10)	12m 43s
Tests (macos-14 / Python 3.11)	12m 6s
Tests (macos-14 / Python 3.12)	11m 9s
Tests (windows-latest / Python 3.9)	32m 53s
Tests (windows-latest / Python 3.10)	34m 23s
Tests (windows-latest / Python 3.11)	27m 52s
Tests (windows-latest / Python 3.12)	28m 24s
	7h 32m 13s

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