'Oracle SQL Developer - pre existing tables in new connection. Why?

I am using Oracle SQL developer as part of course I am taking. Every time I create a new connection it keeps adding these tables on its own. I want to create a clean connection to create tables and import DB later from excel. Oracle is really frustrating as compared to SSMS and PostgreSQL. enter image description here



Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source