1 files changed, 0 insertions, 27 deletions

diff --git a/src/helpers/visibility-helper.js b/src/helpers/visibility-helper.js
deleted file mode 100644
index 8456c4ecf..000000000
--- a/src/helpers/visibility-helper.js
+++ /dev/null
@@ -1,27 +0,0 @@
-export function onVisibilityChange(cb) {
-  let isVisible = true;
-
-  if (!cb) {
-    throw new Error('no callback given');
-  }
-
-  function focused() {
-    if (!isVisible) {
-      cb(isVisible = true);
-    }
-  }
-
-  function unfocused() {
-    if (isVisible) {
-      cb(isVisible = false);
-    }
-  }
-
-  document.addEventListener('visibilitychange', () => { (document.hidden ? unfocused : focused)(); });
-
-  window.onpageshow = focused;
-  window.onfocus = focused;
-
-  window.onpagehid = unfocused;
-  window.onblur = unfocused;
-}