revert mistaken change #539

Job	Run time
Test installation using system supplied libs	38s
Test installation using newest version of Taskflow	28s
Test sse2 code on Linux (gcc)	16m 57s
Test install with generated cython files	4m 27s
Python 3.7	7m 47s
Python 3.7	8m 19s
Python 3.7	11m 45s
Python 3.8	6m 6s
Python 3.8	9m 39s
Python 3.8	12m 6s
Python 3.9	8m 8s
Python 3.9	8m 30s
Python 3.9	10m 57s
Python 3.10	5m 58s
Python 3.10	9m 34s
Python 3.10	11m 29s
Python 3.11	6m 48s
Python 3.11	9m 24s
Python 3.11	10m 44s
	2h 39m 44s

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