User can`t delete uploaded file in dataset publisher.
Steps:
- Go to "https://sandbox.genesys-pgr.org/dashboard/datasets/edit".
- Enter valid data on the 1 tab.
- Click "Next step" button.
- Upload several valid files (more then 3).
- Click "Remove" button for the first uploaded file.
Expected result: The first uploaded file is removed
Actual result: Request failed with status code 400 could not execute batch;