For the vast majority of devices, you don't actually remove TWRP to get back to the stock recovery. Installing a different recovery is your only real option. Simply install whatever recovery that you want and that will overwrite or replace TWRP. Usually you can follow the instructions on our website for installing TWRP manually, only use the file for whatever recovery you are choosing to install instead of the TWRP file.
Note, we don't keep or maintain a database of stock recoveries. If you are trying to reinstall the stock recovery, you will have to find a copy of the stock recovery on your own.