If you want to remove or delete a Gmail account that is added to your Gmail app, then this article will help you a lot. You can easily remove or delete an account from your mobile device.
How to remove an email account from your mobile device
1. Open the Google Gmail app on your mobile device.
2. Now click the three-line showing on the top-left corner, then click the drop-down arrow and click the manage accounts option.
3. Click the Google option and then select that account you wanna remove from your mobile device.
4. Now click the three dots on the top-right corner and then click the remove account option. Then a confirmation message will be shown again click the remove account option.