Delete row ('510', '20194') from daily_volatility

ticker_id 510
day 20194
implied_open 0.620693257575753
implied_high 0.6810163874680256
implied_low 0.6000563973494492
implied_close 0.6254556099356692
historical_open 0.7937253933193773
historical_high 0.7937253933193773
historical_low 0.7937253933193773
historical_close 0.7937253933193773
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