mariadb tables don't have the prefix "oc_"

Thank you very much for this script!
When running the script I got the following error:
```
ERROR 1146 (42S02) at line 1: Table 'nextcloud.oc_storages' doesn't exist
```
After investigating I found, that the tables in my Nextcloud instance don't have the prefix `oc_`. After adjusting the script (removing the prefixes) it worked well.

Nextcloud version: 22 (Docker)
Database: MariaDB