feat(cactus-example-tcs-huawei): remove deprecated sample app

- `cactus-example-tcs-huawei` is using
    `cactus-plugin-ledger-connector-go-ethereum-socketio` and
    `cactus-plugin-ledger-connector-tcs-huawei-socketio` which will
    be removed as well. Ths sample app can't exist on it's own.
- This is not permanent - we'd love to bring the package back once the
    necessary refactors are done!
- See issue hyperledger#3155 on github for more details on context and reasoning
    of this decision.

Closes: hyperledger#3157

Signed-off-by: Michal Bajer <michal.bajer@fujitsu.com>