diff --git a/extend/api.js b/extend/api.js
deleted file mode 100644
index c8ad2e5..0000000
--- a/extend/api.js
+++ /dev/null
@@ -1,2 +0,0 @@
-"use strict";
-Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/extend/api.ts b/extend/api.ts
deleted file mode 100644
index 828a6aa..0000000
--- a/extend/api.ts
+++ /dev/null
@@ -1,16 +0,0 @@
-interface Command {
-  Initialize(): void;
-
-  Prompting(): void;
-
-  Writing(): void;
-
-  Installing(): void;
-
-  Ending(): void;
-}
-
-interface Console {
-}
-
-export { Command, Console };
\ No newline at end of file