remove channel from channel_timestamps if funding_tx has been dropped from mempool
remove channel from channel_timestamps if funding_tx has been dropped from mempool

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