throw out difficulty checks

ethcore/src/ethereum/ethash.rs

@@ -328,12 +328,12 @@ impl Engine for Ethash {
 		t.sender().map(|_|()) // Perform EC recovery and cache sender
 	}
 
-	/// Check if a new block should replace the best blockchain block.
 	fn is_new_best_block(&self, best_total_difficulty: U256, _best_header: HeaderView, parent_details: &BlockDetails, new_header: &HeaderView) -> bool {
 		is_new_best_block(best_total_difficulty, parent_details, new_header)
 	}
 }
 
+/// Check if a new block should replace the best blockchain block.
 pub fn is_new_best_block(best_total_difficulty: U256, parent_details: &BlockDetails, new_header: &HeaderView) -> bool {
 	parent_details.total_difficulty + new_header.difficulty() > best_total_difficulty
 }