further cleanup #819

Job	Run time
Test sse2 code on Linux (gcc)	6m 17s
Test installation using system supplied libs	3m 4s
Test install with generated cython files	3m 20s
Test installation using newest version of Taskflow	2m 57s
Python 3.9	5m 2s
Python 3.9	9m 2s
Python 3.9	5m 2s
Python 3.10	4m 49s
Python 3.10	7m 44s
Python 3.10	5m 50s
Python 3.11	4m 50s
Python 3.11	7m 32s
Python 3.11	5m 50s
Python 3.12	4m 56s
Python 3.12	7m 45s
Python 3.12	6m 55s
Python 3.13	9s
Python 3.13	20s
Python 3.13	19s
	1h 31m 43s

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