ui: sync job edit: fix showing value for target store upon edit of local sync job

when editing a local sync job, the field would be empty because of
this and not be set to the previously configured remote-store.

The binding is already used for the local datastore, not sure why it
should even be applied to the target where it might not even be valid.

Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>

www/window/SyncJobEdit.js

@@ -223,9 +223,6 @@ Ext.define('PBS.window.SyncJobEdit', {
 			allowBlank: false,
 			autoSelect: false,
 			name: 'remote-store',
-			cbind: {
-			    datastore: '{datastore}',
-			},
 			listeners: {
 			    change: function(field, value) {
 				let me = this;