diff --git a/extensions/ql-vscode/src/databases/db-item.ts b/extensions/ql-vscode/src/databases/db-item.ts
index 51a212481..7a337b46f 100644
--- a/extensions/ql-vscode/src/databases/db-item.ts
+++ b/extensions/ql-vscode/src/databases/db-item.ts
@@ -89,12 +89,6 @@ export interface RemoteRepoDbItem {
   parentListName?: string;
 }
 
-export function isRemoteSystemDefinedListDbItem(
-  dbItem: DbItem,
-): dbItem is RemoteSystemDefinedListDbItem {
-  return dbItem.kind === DbItemKind.RemoteSystemDefinedList;
-}
-
 export function isRemoteUserDefinedListDbItem(
   dbItem: DbItem,
 ): dbItem is RemoteUserDefinedListDbItem {