no need to worry for a directory lock guys.
Just you need to do is, If sqllite3 is not installed, type below command,
>sudo apt-get install sqlite3
Open SVN database by typing this command,
>sqlite3 .svn/wc.db
Now just you need to do is to remove locks entries from SVN DB.
sqlite> select * from wc_lock; 1|-1 sqlite> delete from wc_lock; sqlite> select * from wc_lock; sqlite> .q
Process Completed. You can work on your SVN repository, do commit, update, add, remove operations without issue.
:-)