Delete row ('1992', '20503') from daily_volatility

ticker_id 1992
day 20503
implied_open 0.5365583658838989
implied_high 0.5508454229636478
implied_low 0.5079842517244014
implied_close 0.523858759590789
historical_open 0.652442273308528
historical_high 0.652442273308528
historical_low 0.652442273308528
historical_close 0.652442273308528
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