diff --git a/src/web/app/common/scripts/is-promise.ts b/src/web/app/common/scripts/is-promise.ts
deleted file mode 100644
index 3b4cd70b4..000000000
--- a/src/web/app/common/scripts/is-promise.ts
+++ /dev/null
@@ -1 +0,0 @@
-export default x => typeof x.then == 'function';