diff --git a/near-contract-standards/src/non_fungible_token/core/core_impl.rs b/near-contract-standards/src/non_fungible_token/core/core_impl.rs
index e2e215430..733daf8f1 100644
--- a/near-contract-standards/src/non_fungible_token/core/core_impl.rs
+++ b/near-contract-standards/src/non_fungible_token/core/core_impl.rs
@@ -50,7 +50,6 @@ pub struct NonFungibleToken {
     pub next_approval_id_by_id: Option<LookupMap<TokenId, u64>>,
 }
 
-// TODO
 #[derive(BorshStorageKey, BorshSerialize)]
 #[borsh(crate = "near_sdk::borsh")]
 pub enum StorageKey {