Merge branch 'remove-polyfills' into 'develop'

Remove polyfills, delete application.ts

See merge request soapbox-pub/soapbox!2140

package.json

@@ -95,7 +95,6 @@
     "@types/webpack-assets-manifest": "^5.1.0",
     "@types/webpack-bundle-analyzer": "^4.6.0",
     "@types/webpack-deadcode-plugin": "^0.1.2",
-    "array-includes": "^3.1.5",
     "autoprefixer": "^10.4.2",
     "axios": "^1.2.2",
     "axios-mock-adapter": "^1.21.1",
@@ -120,7 +119,6 @@
     "dotenv": "^16.0.0",
     "emoji-datasource": "5.0.1",
     "emoji-mart": "npm:emoji-mart-lazyload",
-    "es6-symbol": "^3.1.1",
     "escape-html": "^1.0.3",
     "exif-js": "^2.3.0",
     "fork-ts-checker-webpack-plugin": "^7.2.11",
@@ -130,12 +128,9 @@
     "http-link-header": "^1.0.2",
     "immutable": "^4.2.1",
     "imports-loader": "^4.0.0",
-    "intersection-observer": "^0.12.0",
-    "intl": "^1.2.5",
     "intl-messageformat": "9.13.0",
     "intl-messageformat-parser": "^6.0.0",
     "intl-pluralrules": "^1.3.1",
-    "is-nan": "^1.2.1",
     "leaflet": "^1.8.0",
     "libphonenumber-js": "^1.10.8",
     "line-awesome": "^1.3.0",
@@ -144,8 +139,6 @@
     "mark-loader": "^0.1.6",
     "marky": "^1.2.4",
     "mini-css-extract-plugin": "^2.6.0",
-    "object-assign": "^4.1.1",
-    "object.values": "^1.1.0",
     "path-browserify": "^1.0.1",
     "postcss": "^8.4.14",
     "postcss-loader": "^7.0.0",
@@ -181,7 +174,6 @@
     "redux": "^4.1.1",
     "redux-immutable": "^4.0.0",
     "redux-thunk": "^2.2.0",
-    "requestidlecallback": "^0.3.0",
     "reselect": "^4.0.0",
     "resize-observer-polyfill": "^1.5.1",
     "sass": "^1.20.3",