Delete row ('685', '20734') from daily_volatility

ticker_id 685
day 20734
implied_open 0.414324655312715
implied_high 0.6000563973494492
implied_low 0.3603513285669973
implied_close 0.5730697339765903
historical_open 0.2190682085561481
historical_high 0.2190682085561481
historical_low 0.2190682085561481
historical_close 0.2190682085561481
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