How to remove front passenger seat manual recline handle?

Just to be clear, you want to replace the power seat with a manual seat? If that is the case, you may be able get this to work by removing the motor, switch, reclining mechanism. Then installing the manual lever assembly in its place but it would be far easier and cheaper in the long run to just find a manual seat from a salvage yard and swap it in.

Here is the process from the manual on how to replace the seat.

Is there a reason that you want to convert it over? I suspect it is not working but would want to try and fix it or do you know what the issue is with it?

Can you get a picture of what you are trying to remove? I attached the process from the manual on the reclining handle if that is what you need. Otherwise seeing it will help because we may be calling it different things.