Auto merge of #386 - pietroalbini:remove-crypto_proto, r=pietroalbini

Remove yanked crate crypto_proto

Author: bors

config.toml

@@ -884,7 +884,6 @@ crustacean-plugin = { skip = true } #automatic
 cryptdll-sys = { skip = true } #automatic
 cryptnet-sys = { skip = true } #automatic
 crypto-ops = { skip = true } #automatic
-crypto_proto = { skip = true } #automatic
 crypto_vault = { skip = true } #automatic
 cryptominisat = { skip = true } #automatic
 cryptosphere = { skip = true } #automatic