chore: prune unused src legacy code

package.json

@@ -5,29 +5,15 @@
   "scripts": {
     "serve": "vue-cli-service serve",
     "build": "vue-cli-service build",
-    "lint": "vue-cli-service lint",
-    "svgo": "svgo -f src/icons/svg --config=src/icons/svgo.yml"
+    "lint": "vue-cli-service lint"
   },
   "dependencies": {
     "axios": "^0.21.4",
     "echarts": "^5.2.0",
     "echarts-gl": "^2.0.9",
-    "element-ui": "2.13.2",
-    "js-cookie": "^2.2.1",
-    "js-export-excel": "^1.1.2",
-    "mint-ui": "^2.2.13",
-    "mqtt": "^4.3.7",
-    "qrcode": "^1.4.4",
-    "qs": "^6.9.0",
     "vue": "2.6.10",
-    "vue-count-to": "1.0.13",
-    "vue-jsonp": "^0.1.8",
     "vue-router": "^3.0.1",
-    "vue-seamless-scroll": "^1.1.23",
-    "vue-splitpane": "1.0.4",
-    "vuex": "3.1.0",
-    "xlsx": "^0.14.1",
-    "xlsx-style": "^0.8.13"
+    "vue-seamless-scroll": "^1.1.23"
   },
   "devDependencies": {
     "@babel/core": "^7.14.3",
@@ -48,14 +34,9 @@
     "eslint-friendly-formatter": "4.0.1",
     "eslint-loader": "2.0.0",
     "eslint-plugin-vue": "4.7.1",
-    "jquery": "^2.2.4",
     "sass": "1.26.2",
     "sass-loader": "^10.0.1",
-    "script-loader": "^0.7.2",
-    "svg-sprite-loader": "^5.1.1",
-    "svgo": "1.2.0",
     "vue-loader": "15.3.0",
-    "vue-particles": "^1.0.9",
     "vue-style-loader": "4.1.2",
     "vue-template-compiler": "2.6.10",
     "webpack": "4.36.1"