diff --git a/runtime/src/bank.rs b/runtime/src/bank.rs
index 808817e83..e8c644363 100644
--- a/runtime/src/bank.rs
+++ b/runtime/src/bank.rs
@@ -1026,24 +1026,6 @@ impl Bank {
         // Register a bogus executable account, which will be loaded and ignored.
         self.register_native_instruction_processor("", &program_id);
     }
-
-    pub fn is_in_subtree_of(&self, parent: u64) -> bool {
-        if self.slot() == parent {
-            return true;
-        }
-        let mut next_parent = self.parent();
-
-        while let Some(p) = next_parent {
-            if p.slot() == parent {
-                return true;
-            } else if p.slot() < parent {
-                return false;
-            }
-            next_parent = p.parent();
-        }
-
-        false
-    }
 }
 
 impl Drop for Bank {
@@ -1841,30 +1823,6 @@ mod tests {
         assert_eq!(bank.is_votable(), true);
     }
 
-    #[test]
-    fn test_is_in_subtree_of() {
-        let (genesis_block, _) = GenesisBlock::new(1);
-        let parent = Arc::new(Bank::new(&genesis_block));
-        // Bank 1
-        let bank = Arc::new(new_from_parent(&parent));
-        // Bank 2
-        let bank2 = new_from_parent(&bank);
-        // Bank 5
-        let bank5 = Bank::new_from_parent(&bank, &Pubkey::default(), 5);
-
-        // Parents of bank 2: 0 -> 1 -> 2
-        assert!(bank2.is_in_subtree_of(0));
-        assert!(bank2.is_in_subtree_of(1));
-        assert!(bank2.is_in_subtree_of(2));
-        assert!(!bank2.is_in_subtree_of(3));
-
-        // Parents of bank 5: 0 -> 1 -> 5
-        assert!(bank5.is_in_subtree_of(0));
-        assert!(bank5.is_in_subtree_of(1));
-        assert!(!bank5.is_in_subtree_of(2));
-        assert!(!bank5.is_in_subtree_of(4));
-    }
-
     #[test]
     fn test_bank_inherit_tx_count() {
         let (genesis_block, mint_keypair) = GenesisBlock::new(500);