[Glitch] Remove setting for unfollow confirmation modal, and make it unconditional

Port 37ca59815c to glitch-soc

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

app/javascript/flavours/glitch/initial_state.js

@@ -118,7 +118,6 @@ export const source_url = getMeta('source_url');
 export const timelinePreview = getMeta('timeline_preview');
 export const title = getMeta('title');
 export const trendsAsLanding = getMeta('trends_as_landing_page');
-export const unfollowModal = getMeta('unfollow_modal');
 export const useBlurhash = getMeta('use_blurhash');
 export const usePendingItems = getMeta('use_pending_items');
 export const version = getMeta('version');