[PATCH proxmox-backup 13/14] fix #7904: Remove clear button from calendar selector

[Jonas Theisen <j.theisen@proxmox.com>]

Since the schedule fields in all the forms do not allow
empty inputs anymore it would be unintuitive to have a clear button.

This patch removes the trigger and listener logic for that.

Can be seen optional and is not needed to fix #7904

Signed-off-by: Jonas Theisen <j.theisen@proxmox.com>
---
 www/form/CalendarEvent.js | 19 -------------------
 1 file changed, 19 deletions(-)

diff --git a/www/form/CalendarEvent.js b/www/form/CalendarEvent.js
index b050da694..d6cc6e0e9 100644
--- a/www/form/CalendarEvent.js
+++ b/www/form/CalendarEvent.js
@@ -53,25 +53,6 @@ Ext.define('PBS.form.CalendarEvent', {
         return data;
     },
 
-    triggers: {
-        clear: {
-            cls: 'pmx-clear-trigger',
-            weight: -1,
-            hidden: true,
-            handler: function () {
-                this.triggers.clear.setVisible(false);
-                this.setValue('');
-            },
-        },
-    },
-
-    listeners: {
-        change: function (field, value) {
-            let canClear = (value ?? '') !== '';
-            field.triggers.clear.setVisible(canClear);
-        },
-    },
-
     store: {
         type: 'calendarEventExamples',
     },
-- 
2.47.3