Revert vendoring of SciPy functions #694

Job	Run time
build_windows (3.10)	9m 52s
build_windows (3.11)	6m 48s
build_windows (3.12)	10m 24s
build_windows (3.9)	9m 39s
build_linux (3.9)	3m 14s
build_windows (3.13)	6m 43s
build_linux (3.10)	3m 13s
build_linux (3.11)	3m 8s
build_linux (3.12)	2m 53s
build_linux (3.13)	3m 12s
test_linux (3.11, false, ubuntu-latest)	2m 42s
test_linux (3.10, false, ubuntu-latest)	2m 4s
test_linux (3.12, false, ubuntu-latest)	1m 46s
test_linux (3.13, false, ubuntu-latest)	1m 56s
test_linux (3.9, false, ubuntu-latest)	1m 47s
test_windows (3.12, false, windows-latest)	3m 7s
test_windows (3.11, false, windows-latest)	3m 25s
test_windows (3.10, false, windows-latest)	4m 9s
test_windows (3.9, false, windows-latest)	2m 56s
test_windows (3.13, false, windows-latest)	3m 10s
	1h 26m 8s

Provide feedback