ui: datastore content: avoid duplicate masking on load error

we already handle that manually in the onLoad and want to further
extend that, so drop the more generic monStoreError

Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>

www/datastore/Content.js

@@ -75,7 +75,6 @@ Ext.define('PBS.DataStoreContent', {
 		'text',
 		'backup-time',
 	    ]);
-	    Proxmox.Utils.monStoreErrors(view, this.store);
 	},
 
 	control: {