It had replication set in it about 6 months back. But now it is removed.

As you said i can add replication once again and remove it.But it is a production server so i have to take care while doing it.

So is there any other method?

What if i change recovery model to simple and then shrink the log file and then once again change to full recovery model?

Also if i have to add replication again then i do have some doubts. As this is sql server express so it will act only as subscriber.Also is it ok if i add replication to one new table in that database?