`tokens.accounts` always returns zero when querying ZTG token amount

[maltekliemann]

Select an account that has a positive amount of ZTG and then query tokens.accounts(account). The result is

{
  free: 0
  reserved: 0
  frozen: 0
}

Instead, ZTG has to be queried via the system pallet.

It seems like the ZTG tokens from the token pallet are just not used. But in that case, they should probably be removed.