simplify inference #612

Job	Run time
downgrade (1.10, core)	22s
downgrade (1.10, downstream)	19s
downgrade (1.10, misc)	20s
downgrade (1.10, wrappers)	18s
test (core, 1.10, ubuntu-latest)	17m 4s
test (core, 1.10, macos-latest)	25m 5s
test (core, pre, macos-latest)	42m 3s
test (core, pre, ubuntu-latest)	47m 52s
test (core, 1, macos-latest)	25m 21s
test (downstream, 1.10, macos-latest)	7m 11s
test (core, 1, ubuntu-latest)	30m 20s
test (downstream, 1, ubuntu-latest)	23m 33s
test (downstream, 1.10, ubuntu-latest)	11m 32s
test (downstream, 1, macos-latest)	14m 32s
test (downstream, pre, ubuntu-latest)	48m 21s
test (downstream, pre, macos-latest)	33m 36s
test (wrappers, 1.10, ubuntu-latest)	9m 44s
test (wrappers, 1, macos-latest)	11m 18s
test (wrappers, pre, ubuntu-latest)	47m 20s
test (misc, 1, ubuntu-latest)	20m 9s
test (misc, 1.10, macos-latest)	5m 43s
test (wrappers, pre, macos-latest)	32m 42s
test (misc, 1, macos-latest)	12m 15s
test (wrappers, 1, ubuntu-latest)	19m 16s
test (misc, pre, ubuntu-latest)	48m 11s
test (wrappers, 1.10, macos-latest)	6m 24s
test (misc, 1.10, ubuntu-latest)	8m 39s
test (misc, pre, macos-latest)	31m 1s
	9h 40m 31s

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