Allow clippy::unit_arg because of derive(Arbitrary)

zebra-chain/src/block.rs

@@ -1,4 +1,5 @@
 //! Blocks and block-related structures (heights, headers, etc.)
+#![allow(clippy::unit_arg)]
 
 mod hash;
 mod header;

zebra-chain/src/work/difficulty.rs

@@ -9,6 +9,7 @@
 //! The block work is used to find the chain with the greatest total work. Each
 //! block's work value depends on the fixed threshold in the block header, not
 //! the actual work represented by the block header hash.
+#![allow(clippy::unit_arg)]
 
 use crate::block;