Delete row ('697', '20305') from daily_volatility

ticker_id 697
day 20305
implied_open 0.2111309546229543
implied_high 0.2143058561962319
implied_low 0.2000187991164831
implied_close 0.2111309546229543
historical_open 0.2270054624893419
historical_high 0.2270054624893419
historical_low 0.2270054624893419
historical_close 0.2270054624893419
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