AcctIdx: remove auto Debug trait (#19905)

runtime/src/in_mem_accounts_index.rs

@@ -15,7 +15,6 @@ use std::ops::RangeBounds;
 type K = Pubkey;
 
 // one instance of this represents one bin of the accounts index.
-#[derive(Debug)]
 pub struct InMemAccountsIndex<T: IndexValue> {
     // backing store
     map_internal: RwLock<HashMap<Pubkey, AccountMapEntry<T>>>,
@@ -23,6 +22,12 @@ pub struct InMemAccountsIndex<T: IndexValue> {
     bin: usize,
 }
 
+impl<T: IndexValue> Debug for InMemAccountsIndex<T> {
+    fn fmt(&self, _f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        Ok(())
+    }
+}
+
 impl<T: IndexValue> InMemAccountsIndex<T> {
     pub fn new(storage: &AccountsIndexStorage<T>, bin: usize) -> Self {
         Self {