/var/www/mainsite/config/statamic/revisions.php
<?php
return [
/*
|--------------------------------------------------------------------------
| Revisions
|--------------------------------------------------------------------------
|
| Revisions must be enabled per-collection by adding `revisions: true` to
| the collection's yaml file. Here you may disable revisions completely
| in one go. This is useful for disabling revisions per environment.
|
*/
'enabled' => env('STATAMIC_REVISIONS_ENABLED', false),
];