Delete row ('2756', '20181') from daily_volatility

ticker_id 2756
day 20181
implied_open 0.174619586530263
implied_high 0.2397050687824519
implied_low 0.174619586530263
implied_close 0.2381176179958132
historical_open 0.1968438975432056
historical_high 0.1968438975432056
historical_low 0.1968438975432056
historical_close 0.1968438975432056
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