删除无用代码

Former-commit-id: a8c39c0b52ccc33816d3f8011988f2e7fad565a0

package.json

@@ -17,35 +17,20 @@
     "babel-polyfill": "^6.26.0",
     "better-scroll": "^1.12.1",
     "clipboard-polyfill": "^2.4.1",
-    "countup.js": "^1.9.3",
     "dayjs": "^1.6.7",
-    "echarts": "^4.1.0",
     "element-ui": "^2.4.4",
-    "file-saver": "^1.3.3",
     "flex.css": "^1.1.7",
-    "github-markdown-css": "^2.10.0",
-    "highlight.js": "^9.12.0",
     "js-cookie": "^2.2.0",
     "lodash": "^4.17.10",
     "lowdb": "^1.0.0",
-    "marked": "^0.3.9",
     "mockjs": "^1.0.1-beta3",
-    "papaparse": "^4.3.6",
     "particles.js": "^2.0.0",
-    "quill": "^1.3.4",
     "screenfull": "^3.3.2",
-    "simplemde": "^1.11.2",
     "ua-parser-js": "^0.7.18",
-    "v-charts": "^1.17.6",
-    "v-contextmenu": "^2.7.0",
     "vue": "^2.5.17",
-    "vue-grid-layout": "^2.1.11",
     "vue-i18n": "^7.4.2",
-    "vue-json-tree-view": "^2.1.4",
     "vue-router": "^3.0.1",
-    "vue-splitpane": "^1.0.2",
-    "vuex": "^3.0.1",
-    "xlsx": "^0.12.0"
+    "vuex": "^3.0.1"
   },
   "devDependencies": {
     "@kazupon/vue-i18n-loader": "^0.3.0",