Delete row ('500', '20734') from daily_volatility

ticker_id 500
day 20734
implied_open 0.6841912890413031
implied_high 0.7556265744400472
implied_low 0.6683167811749156
implied_close 0.7080030508408844
historical_open 0.6000563973494492
historical_high 0.6000563973494492
historical_low 0.6000563973494492
historical_close 0.6000563973494492
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