Remove a whole bunch of unused legacy deps

package.json

@@ -47,9 +47,9 @@
     "cldr": "^7.1.1",
     "clean-webpack-plugin": "^4.0.0",
     "copy-webpack-plugin": "^11.0.0",
-    "core-js": "^3.21.1",
     "css-loader": "^6.0.0",
     "css-minimizer-webpack-plugin": "^5.0.1",
+    "depcheck": "^1.4.7",
     "eslint": "^8.35.0",
     "eslint-config-prettier": "^4.1.0",
     "eslint-import-resolver-babel-module": "^5.3.1",
@@ -62,8 +62,6 @@
     "eslint-plugin-react-hooks": "^4.4.0",
     "gh-pages": "^6.0.0",
     "http-server": "^14.1.1",
-    "husky": "^1.1.2",
-    "lint-staged": "^12.3.7",
     "mini-css-extract-plugin": "^2.7.6",
     "npm-run-all": "^4.1.3",
     "prettier": "^2.6.1",
@@ -81,14 +79,10 @@
     "@emotion/react": "^11.8.2",
     "@emotion/styled": "^11.8.1",
     "@gatsbyjs/reach-router": "^1.3.6",
-    "@mui/base": "^5.0.0-beta.9",
     "@mui/icons-material": "^5.15.8",
     "@mui/lab": "^5.0.0-alpha.124",
     "@mui/material": "^5.14.3",
     "@mui/system": "^5.14.3",
-    "@mui/utils": "^5.14.3",
-    "assert": "^2.0.0",
-    "github-markdown-css": "^5.2.0",
     "html-webpack-plugin": "^5.5.3",
     "i18next": "^22.4.10",
     "immutability-helper": "^3.1.1",
@@ -107,19 +101,12 @@
     "react-draggable": "^4.4.6",
     "react-i18next": "^11.8.5",
     "react-markdown": "^7.1.0",
-    "react-rnd": "^10.3.7",
     "remark-emoji": "3.0.1",
     "remark-gfm": "^3.0.1",
-    "source-map-support": "^0.5.16",
-    "stream-http": "^3.2.0",
-    "tmp": "^0.2.1",
     "typeface-roboto": "^0.0.54",
     "typeface-source-code-pro": "^0.0.71",
-    "url": "^0.11.1",
-    "util": "^0.12.5",
     "uuid": "^8.3.1",
-    "whatwg-fetch": "^3.6.17",
-    "winston": "^3.8.2"
+    "whatwg-fetch": "^3.6.17"
   },
   "resolutions": {
     "cacache/y18n": "^4.0.1",