Remove hot_hdiff_start_slot

Author: dapplion

beacon_node/store/src/config.rs

@@ -7,7 +7,7 @@ use std::io::Write;
 use std::num::NonZeroUsize;
 use superstruct::superstruct;
 use types::non_zero_usize::new_non_zero_usize;
-use types::{EthSpec, Slot};
+use types::EthSpec;
 use zstd::Encoder;
 
 // Only used in tests. Mainnet sets a higher default on the CLI.
@@ -66,8 +66,6 @@ pub struct OnDiskStoreConfig {
     #[superstruct(only(V22, V23))]
     pub hierarchy_config: HierarchyConfig,
     // TODO(hdiff): Should persist the hot hierarchy_config too?
-    #[superstruct(only(V23))]
-    pub hot_hdiff_start_slot: Slot,
 }
 
 impl OnDiskStoreConfigV22 {