Delete row ('927', '20734') from daily_volatility

ticker_id 927
day 20734
implied_open 0.3794007380066624
implied_high 0.3794007380066624
implied_low 0.3079654526079184
implied_close 0.3079654526079184
historical_open 0.1968438975432056
historical_high 0.1968438975432056
historical_low 0.1968438975432056
historical_close 0.1968438975432056
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