Delete row ('1553', '20686') from daily_volatility

ticker_id 1553
day 20686
implied_open 0.8778602850112313
implied_high 0.9413583164767814
implied_low 0.8746853834379538
implied_close 0.8889724405177025
historical_open 0.9270712593970326
historical_high 0.9270712593970326
historical_low 0.9270712593970326
historical_close 0.9270712593970326
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