Revert #1563 and #1567 to prepare for patch release (#1570) #591

Job	Run time
clippy/stable	20s
nostd/thumbv6m-none-eabi/stable	13s
format/nightly	16s
docs/nightly	22s
Pass MSRV values to other jobs	3s
cross_test/s390x-unknown-linux-gnu/stable	8m 25s
miri	10m 58s
cross_test/i686-unknown-linux-gnu/stable	1m 59s
cargo-careful	2m 10s
blas-msrv	41s
tests/beta	2m 45s
tests/stable	2m 19s
tests/nightly	3m 0s
tests/1.64.0	3m 27s
conclusion	2s
	37m 0s

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