Delete Gravity Form Entries After Submission

The following is a code snippet originally posted by Daniel McClure on GitHub as a Gist.

functions.php

<?php
// Delete Gravity Form Entries for form ID 1 after submission.
// Switch action to `gform_after_submission` to target all forms.
add_action( 'gform_after_submission_1', 'remove_form_entry' );
function remove_form_entry( $entry ) {
    GFAPI::delete_entry( $entry['id'] );
}

Original Gist