SW-18947 - Fix theme cache warmup ui event

Author: htkassner

engine/Shopware/Plugins/Default/Backend/PluginManager/Views/backend/plugin_manager/app.js

@@ -142,7 +142,6 @@ Ext.define('Shopware.apps.PluginManager', {
         'enable-connect-introduction-mode',
         'enable-premium-plugins-mode',
         'enable-importexport-teaser-mode',
-        'shopware-theme-cache-warm-up-request',
         'reload-main-menu',
         'destroy-login',
         'store-register',