Hi @donna,
The .txt files are used for advanced odrive configuration settings, so they cannot be removed. One of the advanced configuration settings is actually for the trash notifications. 
It is possible to mark them as “hidden” so that they don’t normally show up in the listing. Let me know if you would like more information on this, and also if you are using MacOS or Windows.
You can read more about disabling trash notifications here: Trash notifications