crypto-common: remove std
feature
#1680
Merged
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As of #1660, the
crypto-common
crate stopped linkingstd
entirely by switching tocore::error::Error
.That PR didn't remove the
std
feature however, which was retained to transitively activate thestd
features ofgetrandom
andrand_core
optioinally in the event their corresponding features are enabled.This PR goes ahead and removes it entirely, which also unblocks being able to remove the
std
feature from other crates likeaead
,cipher
,digest
, anduniversal-hash
.