Disable inline_edit() on edit.php

I was never able to find a filter either, but there is a check for whether the taxonomy is allowed to show it’s UI. So what I used to do in one of my plugins was to tweak the $wp_taxonomies global variable on the edit page.

/**
 * Disable the UI for categories, but only on EDIT screen
 * which prevents them from appearing in quick edit
 */
add_action( 'load-edit.php', 'wpa_130501_disable_ui' );

function wpa_130501_disable_ui(){
    global $wp_taxonomies;
    $wp_taxonomies['category']->show_ui = FALSE;
}

The quick-edit section needs a lot of love in a future update.