To remove someone else's Google account from your device, you can follow these steps:
1. Open the Settings app on your device. This is usually represented by a gear icon and can be found on your home screen or app drawer.
2. Scroll down and tap on "Accounts" or "Users & Accounts," depending on your device's manufacturer and installed software version.
3. Look for the Google account you want to remove and tap on it.
4. On the account page, you should see an option to "Remove Account" or a similar variation. Tap on it.
5. A confirmation dialog may appear, asking if you're sure you want to remove the account. Confirm by tapping on "Remove Account."
Please note that the steps may vary slightly depending on the exact device model and the version of Android you are using. The general procedure, however, should remain similar.
It's important to highlight that removing someone else's Google account from your device may have unintended consequences, such as loss of data and access to apps or services associated with that account. Make sure to back up any important information and consider discussing the situation with the account owner if necessary.