Delete row ('1798', '20209') from daily_volatility

ticker_id 1798
day 20209
implied_open 0.5476705213903703
implied_high 0.5619575784701191
implied_low 0.5349709150972602
implied_close 0.5413207182438152
historical_open 0.8032500980392098
historical_high 0.8032500980392098
historical_low 0.8032500980392098
historical_close 0.8032500980392098
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