Delete row ('635', '20657') from daily_volatility

ticker_id 635
day 20657
implied_open 1.136614763233348
implied_high 1.166776328179485
implied_low 1.03184301131519
implied_close 1.081053985700992
historical_open 1.168363778966123
historical_high 1.168363778966123
historical_low 1.168363778966123
historical_close 1.168363778966123
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