feat(chain): unused dep

Author: andrussal

nomos-core/chain-defs/Cargo.toml

@@ -10,7 +10,6 @@ workspace = true
 
 [dependencies]
 anyhow                 = { default-features = false, version = "1.0" }
-ark-ff                 = "0.4"
 async-trait            = { version = "0.1" }
 bincode                = { version = "1.3" }
 blake2                 = { default-features = false, version = "0.10" }