Allows benchmarks that do not use linspace to run on no_std (#1495) #439

Job	Run time
clippy/stable	16s
cross_test/s390x-unknown-linux-gnu/stable	7m 23s
docs/nightly	22s
Pass MSRV values to other jobs	4s
cargo-careful	2m 16s
nostd/thumbv6m-none-eabi/stable	18s
cross_test/i686-unknown-linux-gnu/stable	1m 28s
format/nightly	14s
miri	8m 20s
tests/stable	2m 37s
blas-msrv	39s
tests/nightly	3m 18s
tests/beta	2m 43s
tests/1.64.0	3m 45s
conclusion	4s
	33m 47s

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