Cleanup dead code #11605

Job	Run time
style	21s
Tests (ubuntu-latest / Python 3.9)	25m 28s
Tests (ubuntu-latest / Python 3.10)	25m 30s
Doctests (ubuntu-latest / Python 3.11)	3m 59s
Tests (ubuntu-latest / Python 3.11)	22m 30s
Tests (ubuntu-latest / Python 3.12)	25m 42s
Example notebooks (ubuntu-latest / Python 3.12)	11m 22s
Tests (macos-13 / Python 3.9)	33m 29s
Tests (macos-13 / Python 3.10)	30m 40s
Example scripts (ubuntu-latest / Python 3.12)	7m 46s
Tests (macos-13 / Python 3.11)	34m 38s
Tests (macos-13 / Python 3.12)	23m 22s
Tests (macos-14 / Python 3.9)	17m 5s
Tests (macos-14 / Python 3.10)	14m 15s
Tests (macos-14 / Python 3.11)	12m 9s
Tests (macos-14 / Python 3.12)	9m 56s
Tests (windows-latest / Python 3.9)	37m 37s
Tests (windows-latest / Python 3.10)	30m 22s
Tests (windows-latest / Python 3.11)	27m 8s
Tests (windows-latest / Python 3.12)	22m 34s
	6h 55m 53s

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