Delete row ('56', '20731') from daily_volatility

ticker_id 56
day 20731
implied_open 0.6000563973494492
implied_high 0.6000563973494492
implied_low 0.4952846454312914
implied_close 0.4968720962179302
historical_open 0.427024261605825
historical_high 0.427024261605825
historical_low 0.427024261605825
historical_close 0.427024261605825
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