Delete row ('994', '20735') from daily_volatility

ticker_id 994
day 20735
implied_open 0.3333646651941384
implied_high 0.3333646651941384
implied_low 0.3016156494613633
implied_close 0.3301897636208609
historical_open 0.1968438975432056
historical_high 0.1968438975432056
historical_low 0.1968438975432056
historical_close 0.1968438975432056
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