fix: remove mathlive demo to fixed site build error (#2587)

Author: zzcr

examples/sites/demos/pc/app/fluent-editor/options-formula-composition-api.vue

@@ -51,18 +51,6 @@ export default {
       },
       codeFiles: ['options.vue']
     },
-    {
-      demoId: 'formula',
-      name: {
-        'zh-CN': '可编辑公式',
-        'en-US': 'Formula'
-      },
-      desc: {
-        'zh-CN': '通过设置 <code>options</code> 中的 <code>mathlive</code> 为 true 开启可编辑公式功能。',
-        'en-US': ''
-      },
-      codeFiles: ['options-formula.vue']
-    },
     {
       demoId: 'data-switch',
       name: {

examples/sites/demos/pc/app/fluent-editor/options-formula.vue

@@ -41,7 +41,6 @@
     "github-markdown-css": "~5.1.0",
     "highlight.js": "^11.5.1",
     "marked": "^4.3.0",
-    "mathlive": "^0.101.1",
     "prismjs": "^1.28.0",
     "sortablejs": "1.15.0",
     "tailwindcss": "^3.2.4",