[FIX] Discussions not loading message history if not joined (#24316)

server/methods/loadHistory.js

@@ -18,7 +18,7 @@ Meteor.methods({
 
 		const fromId = Meteor.userId();
 
-		const room = Rooms.findOneById(rid, { fields: { t: 1 } });
+		const room = Rooms.findOneById(rid);
 		if (!room) {
 			return false;
 		}
@@ -27,10 +27,6 @@ Meteor.methods({
 			return false;
 		}
 
-		if (!room) {
-			return false;
-		}
-
 		const canAnonymous = settings.get('Accounts_AllowAnonymousRead');
 		const canPreview = hasPermission(fromId, 'preview-c-room');