Delete unused schedule_idle_task.js

app/soapbox/features/ui/util/schedule_idle_task.js

@@ -1,29 +0,0 @@
-// Wrapper to call requestIdleCallback() to schedule low-priority work.
-// See https://developer.mozilla.org/en-US/docs/Web/API/Background_Tasks_API
-// for a good breakdown of the concepts behind this.
-
-import Queue from 'tiny-queue';
-
-const taskQueue = new Queue();
-let runningRequestIdleCallback = false;
-
-function runTasks(deadline) {
-  while (taskQueue.length && deadline.timeRemaining() > 0) {
-    taskQueue.shift()();
-  }
-  if (taskQueue.length) {
-    requestIdleCallback(runTasks);
-  } else {
-    runningRequestIdleCallback = false;
-  }
-}
-
-function scheduleIdleTask(task) {
-  taskQueue.push(task);
-  if (!runningRequestIdleCallback) {
-    runningRequestIdleCallback = true;
-    requestIdleCallback(runTasks);
-  }
-}
-
-export default scheduleIdleTask;