Remove create/update folders from schedules

What does this MR do and why?

I came across the update/create forms in the schedules directory where the new form was not mounted. These folders don't look to be used, so we are removing them in this MR.

Screenshots or screen recordings

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Before	After

How to set up and validate locally

1. In rails console enable the experiment fully

   Feature.enable(:pipeline_schedules_vue)

2. Verify Build > Schedules works

MR acceptance checklist

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• I have evaluated the MR acceptance checklist for this MR.