Delete row ('1856', '20706') from daily_volatility

ticker_id 1856
day 20706
implied_open 0.7064156000542456
implied_high 0.7603889267999634
implied_low 0.6905410921878581
implied_close 0.704828149267607
historical_open 0.7842006885995447
historical_high 0.7842006885995447
historical_low 0.7842006885995447
historical_close 0.7842006885995447
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