The procedure for deleting a Google account may vary depending on the Android version.
The following example describes the procedure using the IS655.2 with Android 9.

	Unlock the device.
	In the main menu, select the <Settings> menu item.
	Select the <Accounts> menu item.
	Select the Google account you want to delete.
	Tap <Remove account> and confirm the operation.

For more information on deleting a Google account, visit the Google Android website.

https://support.google.com/contacts/answer/9423168?hl=en