feat: remove invalid pdf page num option

Author: subframe7536

src/editor/pdf.scss

@@ -18,16 +18,6 @@
     --background-primary: transparent;
   }
 
-  @page {
-    body.pdf-export-page-num {
-      @bottom-center {
-        content: counter(page);
-        font-size: 10pt !important;
-        margin-top: 10pt !important;
-      }
-    }
-  }
-
   body.pdf-export-page-break {
     :is(h1, h2, h3, h4, h5, h6) {
       page-break-after: avoid;

src/style-settings/editor.ts

@@ -931,12 +931,6 @@ export default Settings.create('maple-editor', 'Maple Editor').children([
             zh: '导出时将页面背景颜色设置为透明',
           },
         })
-        .addClassToggle('pdf-export-page-num', {
-          title: {
-            en: 'Add Page Numbers in The Footer',
-            zh: '导出时页脚添加页号',
-          },
-        })
         .addClassToggle('pdf-export-page-break', {
           title: {
             en: 'Better Page Break Strategy',