Cannot call jQuery .flickity method inside ready.flickity event

I need to remove a certain slide on mobile devices. I'm waiting for Flickity to initalize with the ready.flickity event, then using the remove method, and getting an error that Flickity is not initialized.

**Console error:**
```
flickity not initialized. Cannot call methods, i.e. $().flickity("remove")
```

**Test case:** https://codepen.io/krjo/pen/zVgaYY

Start with the linked CodePen test case and reproduce the error around the ready.flickity event and the jQuery remove method. Trace how Flickity initialization is exposed to the jQuery method, then verify that removing a slide from the ready event no longer reports Flickity as uninitialized.

Written by the indexing model from the issue text.