It should be possible to disable image attachments on a Add Listing/Add Details page using a tickbox in Settings, Listings.
Workaround to hide the attachment button seems to be to use “Code snippets” Wordpress plugin or similar and create a new PHP snippet:
add_filter(
'hivepress/v1/forms/listing_update',
function( $form ) {
unset($form['fields']['images']);
return $form;
},
1000
);