To delete archives after opening them:

Choose Archiver > Preferences and click General.

In the “After extracting an archive” section, choose either “Move archive to Trash” or “Delete archive immediately”.
You can set Archiver to delete archives after opening them.
Choose Archiver > Preferences and click General.
In the “After extracting an archive” section, choose either “Move archive to Trash” or “Delete archive immediately”.
When you choose “Delete archive immediately” you will not be able to recover the archive.