Good question @jtd1216! If this is for a temporary solution while replacing a door, one option is to exclude this sensor from your armed modes. In the Ring app, if you open the menu and tap “settings”, you’ll see"Mode Settings" as an option. Tapping on a mode (home, away) will give you the option to include or exclude specific sensors for that mode.
This means the Contact Sensor will remain connected to your system, but will not factor in to armed modes or emergency alerts. If you still want to completely remove that contact sensor, you can do so by visiting the Contact Sensor in your Ring app, tapping the settings cog in the top right hand corner of the page, and then selecting “Remove device” for instructions on completing removal. This Contact Sensor can certainly be added back to the system afterwards. I hope this helps! 