You don't have to do anything special to remove the drivers seat.
Slide the seat all the way forward, remove the rear bolts holding it in, slide the seat all the way back, remove the bolts in the front, disconnect the wires that go to from the
seatbelt to the harness in the floor. If you have seat heaters, remove those wires as well.

Push the seat button to fold the seat forward, lift up, and
carefully pull it out.

When putting it back in, do the reverse.
Put some blue loc-tite on the threads of the seat bolts when
reinstalling.

No need to disconnect the battery and no need to worry about
ECM damage.