Delete row ('754', '20727') from daily_volatility

ticker_id 754
day 20727
implied_open 0.2460548719290069
implied_high 0.2587544782221169
implied_low 0.2428799703557294
implied_close 0.2460548719290069
historical_open 0.1968438975432056
historical_high 0.1968438975432056
historical_low 0.1968438975432056
historical_close 0.1968438975432056
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