mute simpleimputer for now #49

Job	Run time
tutorials (3.8, ubuntu-20.04)	1m 59s
unit (3.8, ubuntu-20.04)	19s
readme (3.8, ubuntu-20.04)	2m 7s
unit (3.8, macos-latest)	59s
devel (3.8, ubuntu-latest)	2m 25s
readme (3.8, macos-latest)	1m 47s
unit (3.9, ubuntu-20.04)	23s
tutorials (3.9, ubuntu-20.04)	2m 16s
readme (3.9, ubuntu-20.04)	1m 34s
unit (3.9, macos-latest)	15s
tutorials (3.10, ubuntu-20.04)	2m 14s
readme (3.9, macos-latest)	1m 3s
unit (3.10, ubuntu-20.04)	21s
unit-mlprimitives (3.8, ubuntu-20.04)	1m 41s
tutorials (3.11, ubuntu-20.04)	2m 14s
readme (3.10, ubuntu-20.04)	1m 38s
unit (3.10, macos-latest)	15s
unit-mlprimitives (3.8, macos-latest)	2m 14s
readme (3.10, macos-latest)	1m 11s
unit (3.11, ubuntu-20.04)	23s
unit-mlprimitives (3.9, ubuntu-20.04)	1m 48s
readme (3.11, ubuntu-20.04)	1m 28s
unit (3.11, macos-latest)	13s
unit-mlprimitives (3.9, macos-latest)	1m 22s
readme (3.11, macos-latest)	1m 17s
unit (3.12, ubuntu-20.04)	23s
unit-mlprimitives (3.10, ubuntu-20.04)	1m 49s
unit (3.12, macos-latest)	19s
unit-mlprimitives (3.10, macos-latest)	1m 22s
unit (3.13, ubuntu-20.04)	30s
unit-mlprimitives (3.11, ubuntu-20.04)	1m 49s
unit-mlprimitives (3.11, macos-latest)	1m 58s
unit (3.13, macos-latest)	30s
	42m 6s

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