Fix clippy lints

lighthouse/beacon_chain/src/block_production.rs

@@ -23,25 +23,31 @@ where
             .present_slot()?
             .ok_or(Error::PresentSlotIsNone)?;
         let parent_root = self.canonical_leaf_block;
-        let parent_block = self
+        let parent_block_reader = self
             .block_store
-            .get_deserialized(&parent_root)?
-            .ok_or(Error::DBError("Block not found.".to_string()))?;
-        let parent_state = self
+            .get_reader(&parent_root)?
+            .ok_or_else(|| Error::DBError("Block not found.".to_string()))?;
+        let parent_state_reader = self
             .state_store
-            .get_deserialized(&parent_block.state_root())?
-            .ok_or(Error::DBError("State not found.".to_string()))?;
+            .get_reader(&parent_block_reader.state_root())?
+            .ok_or_else(|| Error::DBError("State not found.".to_string()))?;
 
+        let parent_block = parent_block_reader
+            .into_beacon_block()
+            .ok_or_else(|| Error::DBError("Bad parent block SSZ.".to_string()))?;
         let mut block = BeaconBlock {
             slot: present_slot,
             parent_root,
             state_root: Hash256::zero(), // Updated after the state is calculated.
-            ..parent_block.to_beacon_block()
+            ..parent_block
         };
 
+        let parent_state = parent_state_reader
+            .into_beacon_state()
+            .ok_or_else(|| Error::DBError("Bad parent block SSZ.".to_string()))?;
         let state = BeaconState {
             slot: present_slot,
-            ..parent_state.to_beacon_state()
+            ..parent_state
         };
         let state_root = state.canonical_root();
 

lighthouse/beacon_chain/src/lib.rs

@@ -55,7 +55,7 @@ where
         block_store.put(&block_root, &ssz_encode(&genesis_block)[..])?;
 
         let mut leaf_blocks = HashSet::new();
-        leaf_blocks.insert(block_root.clone());
+        leaf_blocks.insert(block_root);
 
         Ok(Self {
             block_store,

lighthouse/db/src/stores/macros.rs

@@ -20,6 +20,7 @@ macro_rules! impl_crud_for_store {
     };
 }
 
+#[allow(unused_macros)]
 macro_rules! test_crud_for_store {
     ($store: ident, $db_column: expr) => {
         #[test]