remove single use AccountStorage.slot_store_count (#29479)

runtime/src/account_storage.rs

@@ -37,11 +37,6 @@ impl AccountStorage {
             .map(|res| res.read().unwrap().values().cloned().collect())
     }
 
-    pub(crate) fn slot_store_count(&self, slot: Slot, store_id: AppendVecId) -> Option<usize> {
-        self.get_account_storage_entry(slot, store_id)
-            .map(|store| store.count())
-    }
-
     pub(crate) fn all_slots(&self) -> Vec<Slot> {
         self.map.iter().map(|iter_item| *iter_item.key()).collect()
     }

runtime/src/accounts_db.rs

@@ -3219,7 +3219,8 @@ impl AccountsDb {
                     );
                     let count = self
                         .storage
-                        .slot_store_count(*slot, account_info.store_id())
+                        .get_account_storage_entry(*slot, account_info.store_id())
+                        .map(|store| store.count())
                         .unwrap()
                         - 1;
                     debug!(