Delete All Automation on Selected Tracks ⌃⇧⌘⌫ – Logic Pro X keyboard command of the day

  Delete All Automation on Selected Tracks    ⌃⇧⌘⌫

Removes all Track and Region automation on the selected tracks. The documentation does not reflect the possibility of removing from more than one track.

Delete automation in Logic Pro – Apple Support

Delete All Automation on Selected Track: Removes all automation from the selected track.