kivy: remove dead code (installwizard waiting_dialog)
kivy: remove dead code (installwizard waiting_dialog)

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