Update styleguide to have the on-this-page styling

Author: MinThaMie

package.json

@@ -65,7 +65,6 @@
     "broccoli-funnel": "^2.0.1",
     "concurrently": "^8.0.1",
     "ember-a11y-testing": "^5.2.1",
-    "ember-anchor": "^1.0.3",
     "ember-auto-import": "^2.10.0",
     "ember-basic-dropdown": "^8.6.0",
     "ember-cli": "~4.12.3",