bitbox02: rm plugin.get_client method: just use default impl
bitbox02: rm plugin.get_client method: just use default impl

wakiyamap/electrum-mona,vialectrum/vialectrum,wakiyamap/electrum-mona,spesmilo/electrum,pooler/electrum-ltc,wakiyamap/electrum-mona,pooler/electrum-ltc,pooler/electrum-ltc,pooler/electrum-ltc,spesmilo/electrum,wakiyamap/electrum-mona,vialectrum/vialectrum,vialectrum/vialectrum,spesmilo/electrum,spesmilo/electrum