final refactoring

package-lock.json

@@ -10,7 +10,6 @@
       "dependencies": {
         "d3": "^7.9.0",
         "firebase": "^12.14.0",
-        "flag-icons": "^7.5.0",
         "html-to-image": "^1.11.13",
         "topojson-client": "^3.1.0",
         "world-atlas": "^2.0.2"
@@ -2336,12 +2335,6 @@
         "@firebase/util": "1.15.1"
       }
     },
-    "node_modules/flag-icons": {
-      "version": "7.5.0",
-      "resolved": "https://registry.npmjs.org/flag-icons/-/flag-icons-7.5.0.tgz",
-      "integrity": "sha512-kd+MNXviFIg5hijH766tt+3x76ele1AXlo4zDdCxIvqWZhKt4T83bOtxUOOMlTx/EcFdUMH5yvQgYlFh1EqqFg==",
-      "license": "MIT"
-    },
     "node_modules/fsevents": {
       "version": "2.3.3",
       "resolved": "https://registry.npmjs.org/fsevents/-/fsevents-2.3.3.tgz",