diff --git a/utils/src/AzExtTreeFileSystem.ts b/utils/src/AzExtTreeFileSystem.ts
index cec61beea7..eb8413c735 100644
--- a/utils/src/AzExtTreeFileSystem.ts
+++ b/utils/src/AzExtTreeFileSystem.ts
@@ -13,7 +13,6 @@ const unsupportedError: Error = new Error(l10n.t('This operation is not supporte
 
 export abstract class AzExtTreeFileSystem<TItem extends types.AzExtTreeFileSystemItem> implements FileSystemProvider {
 
-    private readonly itemCache: Map<string, TItem> = new Map<string, TItem>();
 
     public abstract scheme: string;