To start supporting a token the s2Admin call the SecondSwap_Marketplace::addCoin() function, however, if for any reason the s2Admin decide to not support a token anymore, there is no way to remove that token from the isTokenSupport[] list because the value is hardcoded.
As you can see in the following code, the value of the isTokenSupport[_token] is always set to true
SecondSwap_Marketplace::addCoin()
Use a parameter instead of hardcoding the value:
and
