Remove knip

We could keep knip and include it as a build in the future, but for now we've got value from it by running it for the first time.

Author: zetter-rpf

knip.json

@@ -82,8 +82,7 @@
     "stylelint": "stylelint src/**/*.scss",
     "test": "node scripts/test.js",
     "watch-css": "sass --load-path=./ -q --watch src:src",
-    "heroku-postbuild": "export PUBLIC_URL='' && yarn build",
-    "knip": "knip"
+    "heroku-postbuild": "export PUBLIC_URL='' && yarn build"
   },
   "browserslist": {
     "production": [
@@ -141,7 +140,6 @@
     "jest-transform-stub": "^2.0.0",
     "jest-transformer-svg": "^2.0.0",
     "jest-watch-typeahead": "^2.2.0",
-    "knip": "^6.15.0",
     "mock-match-media": "^0.4.3",
     "path-browserify": "^1.0.1",
     "postcss": "^8.5.10",