Move timetable to a plugin

Plugin repository: https://github.com/kanboard/plugin-timetable

app/Locale/zh_CN/translations.php

@@ -666,28 +666,6 @@ return array(
     'Compact/wide view' => '紧凑/宽视图',
     'No results match:' => '无匹配结果:',
     'Currency' => '货币',
-    'Start time' => '开始时间',
-    'End time' => '结束时1间',
-    'Comment' => '注释',
-    'All day' => '全天',
-    'Day' => '日期',
-    'Manage timetable' => '管理时间表',
-    // 'Overtime timetable' => '',
-    'Time off timetable' => '加班时间表',
-    'Timetable' => '时间表',
-    'Work timetable' => '工作时间表',
-    'Week timetable' => '周时间表',
-    'Day timetable' => '日时间表',
-    'From' => '从',
-    'To' => '到',
-    'Time slot created successfully.' => '成功创建时间段。',
-    'Unable to save this time slot.' => '无法保存此时间段。',
-    'Time slot removed successfully.' => '成功删除时间段。',
-    'Unable to remove this time slot.' => '无法删除此时间段。',
-    'Do you really want to remove this time slot?' => '确认要删除此时间段吗？',
-    'Remove time slot' => '删除时间段',
-    'Add new time slot' => '添加新时间段',
-    'This timetable is used when the checkbox "all day" is checked for scheduled time off and overtime.' => '如果在放假和加班计划中选择全天，则会使用这里配置的时间段。',
     'Files' => '文件',
     'Images' => '图片',
     'Private project' => '私人项目',
@@ -707,7 +685,6 @@ return array(
     'Move the task to another column when assigned to a user' => '指定负责人时移动到其它栏目',
     'Move the task to another column when assignee is cleared' => '移除负责人时移动到其它栏目',
     'Source column' => '原栏目',
-    // 'Show subtask estimates (forecast of future work)' => '',
     'Transitions' => '变更',
     'Executer' => '执行者',
     'Time spent in the column' => '栏目中的时间消耗',