Hello,
You cannot remove it from the account (myaccount.microsoft.com) level. You need to log in as admin via Intune to remove it.
Use this link https://intune.microsoft.com/#view/Microsoft_AAD_UsersAndTenants/UserManagementMenuBlade/~/AllUsers
Click into your user. Then click on Devices. Then on the next page you should be able to find the device, check the box and use delete option.