Delete row ('501', '20733') from daily_volatility

ticker_id 501
day 20733
implied_open 0.898497145237535
implied_high 1.239799064364867
implied_low 0.8937347928776188
implied_close 1.125502607726877
historical_open 0.7873755901728222
historical_high 0.7873755901728222
historical_low 0.7873755901728222
historical_close 0.7873755901728222
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