Get rid of original estimate field on card layouts

[Tori Cook]

I would like to remove time tracking and the "original estimate" field from all issue card layouts.

I removed "worked on" permissions which removed the "time tracking" field from the card layout but I still have the "original estimate" field listed.

I do not see an option to disable the time tracking feature altogether. I do not see "original estimate" field in either the field configurations or custom fields. I don't see any ability to remove fields from within the board's card layout. What am I missing?