Remove collections client-side feature flag (#38540)

app/javascript/mastodon/features/collections/utils.ts

@@ -1,11 +1,5 @@
-import {
-  isClientFeatureEnabled,
-  isServerFeatureEnabled,
-} from '@/mastodon/utils/environment';
+import { isServerFeatureEnabled } from '@/mastodon/utils/environment';
 
 export function areCollectionsEnabled() {
-  return (
-    isClientFeatureEnabled('collections') &&
-    isServerFeatureEnabled('collections')
-  );
+  return isServerFeatureEnabled('collections');
 }

app/javascript/mastodon/utils/environment.ts

@@ -18,7 +18,7 @@ export function isServerFeatureEnabled(feature: ServerFeatures) {
   return initialState?.features.includes(feature) ?? false;
 }
 
-type ClientFeatures = 'collections';
+type ClientFeatures = never;
 
 export function isClientFeatureEnabled(feature: ClientFeatures) {
   try {