Delete row ('754', '20731') from daily_volatility

ticker_id 754
day 20731
implied_open 0.2301803640626194
implied_high 0.2460548719290069
implied_low 0.2270054624893419
implied_close 0.2381176179958132
historical_open 0.1936689959699281
historical_high 0.1936689959699281
historical_low 0.1936689959699281
historical_close 0.1936689959699281
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