[Glitch] Collection share modal cleanup

Port 03b2f77ad2 to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/flavours/glitch/features/ui/util/async-components.js

@@ -62,12 +62,6 @@ export function CollectionsEditor() {
   );
 }
 
-export function ShareCollectionModal() {
-  return import('../../collections/detail/share_modal').then(
-    module => ({default: module.CollectionShareModal})
-  );
-}
-
 export function Status () {
   return import('../../status');
 }