Merge 'upstream/unstable' into capella (#3773)

* Add API endpoint to count statuses of all validators (#3756)
* Delete DB schema migrations for v11 and earlier (#3761)

Co-authored-by: Mac L <mjladson@pm.me>
Co-authored-by: Michael Sproul <michael@sigmaprime.io>

beacon_node/store/src/hot_cold_store.rs

@@ -391,16 +391,6 @@ impl<E: EthSpec, Hot: ItemStore<E>, Cold: ItemStore<E>> HotColdDB<E, Hot, Cold>
         }
     }
 
-    /// Get a schema V8 or earlier full block by reading it and its payload from disk.
-    pub fn get_full_block_prior_to_v9(
-        &self,
-        block_root: &Hash256,
-    ) -> Result<Option<SignedBeaconBlock<E>>, Error> {
-        self.get_block_with(block_root, |bytes| {
-            SignedBeaconBlock::from_ssz_bytes(bytes, &self.spec)
-        })
-    }
-
     /// Convert a blinded block into a full block by loading its execution payload if necessary.
     pub fn make_full_block(
         &self,